keyword
MENU ▼
Read by QxMD icon Read
search

virtual scenario

keyword
https://www.readbyqxmd.com/read/28534770/boscc-bag-of-spatial-context-correlations-for-spatially-enhanced-3d-shape-representation
#1
Zhizhong Han, Zhenbao Liu, Chi-Man Vong, Yu-Shen Liu, Shuhui Bu, Junwei Han, Philip Chen
Highly discriminative 3D shape representations can be formed by encoding the spatial relationship among virtual words into the Bag of Words (BoW) method. To achieve this challenging task, several unresolved issues in the encoding procedure must be overcome for 3D shapes, including i) arbitrary mesh resolution, ii) irregular vertex topology, iii) orientation ambiguity on the 3D surface and iv) invariance to rigid and non-rigid shape transformations. In this work, a novel spatially enhanced 3D shape representation called Bag of Spatial Context Correlations (BoSCC) is proposed to address all these issues...
May 16, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28532974/cost-effectiveness-analysis-of-corneal-collagen-crosslinking-for-progressive-keratoconus
#2
Daniel A Godefrooij, Marie-Josee J Mangen, Elsie Chan, David P S O'Brart, Saskia M Imhof, G Ardine de Wit, Robert P L Wisse
PURPOSE: To evaluate the cost effectiveness of corneal collagen crosslinking (CXL) for progressive keratoconus from the healthcare payer's perspective. DESIGN: A probabilistic Markov-type model using data from published clinical trials and cohort studies. PARTICIPANTS: Two identical cohorts, each comprising 1000 virtual patients with progressive bilateral keratoconus, were modeled; one cohort underwent CXL and the other cohort received no intervention...
May 19, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28527481/rethinking-anatomy-how-to-overcome-challenges-of-medical-education-s-evolution
#3
REVIEW
Bruno Guimarães, Luís Dourado, Stanislav Tsisar, José Miguel Diniz, Maria Dulce Madeira, Maria Amélia Ferreira
INTRODUCTION: Due to scientific and technological development, Medical Education has been readjusting its focus and strategies. Medical curriculum has been adopting a vertical integration model, in which basic and clinical sciences coexist during medical instruction. This context favours the introduction of new complementary technology-based pedagogical approaches. Thus, even traditional core sciences of medical curriculum, like Anatomy, are refocusing their teaching/learning paradigm...
February 27, 2017: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28524072/development-of-a-virtual-collision-sensor-for-industrial-robots
#4
Marina Indri, Stefano Trapani, Ivan Lazzero
Collision detection is a fundamental issue for the safety of a robotic cell. While several common methods require specific sensors or the knowledge of the robot dynamic model, the proposed solution is constituted by a virtual collision sensor for industrial manipulators, which requires as inputs only the motor currents measured by the standard sensors that equip a manipulator and the estimated currents provided by an internal dynamic model of the robot (i.e., the one used inside its controller), whose structure, parameters and accuracy are not known...
May 18, 2017: Sensors
https://www.readbyqxmd.com/read/28517911/is-there-a-potential-of-misuse-for-magnolia-officinalis-compounds-metabolites
#5
Fabrizio Schifano, Valentina Guarino, Duccio G Papanti, Jacopo Baccarin, Laura Orsolini, John M Corkery
OBJECTIVE: Magnolia bark contains magnolol, metabolized to tetrahydromagnolol and honokiol, with both GABA-ergic/cannabimimetic activities, hence of possible attraction to vulnerable individuals/recreational misusers. METHODS: A literature review, assessment of related anecdotal online Magnolia misuse's reports and an overview of Magnolia products' online acquisition possibilities has been here described. RESULTS: No peer-reviewed papers about Magnolia abuse/misuse/dependence/addiction were identified...
May 18, 2017: Human Psychopharmacology
https://www.readbyqxmd.com/read/28516170/mott-physics-beyond-brinkman-rice-scenario
#6
Marcin M Wysokiński, Michele Fabrizio
The main flaw of the well-known Brinkman-Rice description, obtained through the Gutzwiller approximation, of the paramagnetic Mott transition in the Hubbard model is in neglecting high-energy virtual processes that generate for instance the antiferromagnetic exchange J ~ t(2)/U. Here we propose a way to capture those processes by combining the Brinkman-Rice approach with a variational Schrieffer-Wolff transformation, and apply this method to study the single-band metal-to-insulator transition in a Bethe lattice with infinite coordination number, where the Gutzwiller approximation becomes exact...
April 15, 2017: Physical Review. B
https://www.readbyqxmd.com/read/28512256/concomitant-eml4-alk-rearrangement-and-egfr-mutation-in-non-small-cell-lung-cancer-patients-a-literature-review-of-100-cases
#7
REVIEW
Giuseppe Lo Russo, Martina Imbimbo, Giulia Corrao, Claudia Proto, Diego Signorelli, Milena Vitali, Monica Ganzinelli, Laura Botta, Nicoletta Zilembo, Filippo de Braud, Marina Chiara Garassino
The discovery of EGFR mutations and EML4-ALK gene rearrangements has radically changed the therapeutic scenario for patients with advanced non-small cell lung cancer. ALK and EGFR tyrosine-kinase inhibitors showed better activity and efficacy than standard chemotherapy in the first and second line treatment settings, leading to a clear advantage in overall survival of advanced non small cell lung cancer patients harboring these genetic alterations.Historically the coexistence of EGFR mutations and EML4-ALK rearrangements in the same tumor has been described as virtually impossible...
April 26, 2017: Oncotarget
https://www.readbyqxmd.com/read/28503159/quantifying-the-degree-of-movement-dissimilarity-between-two-distinct-action-scenarios-an-exploratory-approach-with-procrustes-analysis
#8
Pedro Passos, Tania Campos, Ana Diniz
Game consoles allow subjects to perform movements which are visually similar to the movements performed in 'real' world scenarios. Beyond entertainment, virtual reality devices are being used in several domains: sports performance; motor rehabilitation; training of risk professions. This article presents the Procrustes method to measure the degree of dissimilarity between movements performed in 'real' and 'virtual' scenarios. For this purpose, the 501 darts game and a video darts game played on a console were used...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28499888/almeria-spatial-memory-recognition-test-asmrt-gender-differences-emerged-in-a-new-passive-spatial-task
#9
Laura Tascón, Luis Miguel García-Moreno, Jose Manuel Cimadevilla
Many different human spatial memory tasks were developed in the last two decades. Virtual reality based tasks make possible developing different scenarios and situations to assess spatial orientation but sometimes these tasks are complex for specific populations like children and older-adults. A new spatial task with a very limited technological requirement was developed in this study. It demanded the use of spatial memory for an accurate solution. It also proved to be sensitive to gender differences, with men outperforming women under high specific difficulty levels...
May 9, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28499856/measuring-soldier-performance-during-the-patrol-exertion-multitask-preliminary-validation-of-a-post-concussive-functional-return-to-duty-metric
#10
Matthew Scherer, Margaret M Weightman, Mary Vining Radomski, Laurel Smith, Marsha Finkelstein, Amy Cecchini, Kristin Jensen Heaton, Karen McCulloch
OBJECTIVE: To assess the discriminant validity of the Patrol-Exertion Multitask (PEMT), a novel, multi-domain, functional return-to-duty clinical assessment for Active Duty military personnel. DESIGN: Measurement development study SETTING: Non-clinical indoor testing facility, Fort Bragg NC PARTICIPANTS: 51 healthy control (HC) Service Members and 33 military personnel with persistent post-concussive symptoms receiving rehabilitation (mTBI) INTERVENTION: Not applicable MAIN OUTCOME MEASURES: Known-groups discriminant validity was evaluated by comparing performance on the PEMT in two groups of Active Duty SM, HC and personnel with mTBI residual symptoms...
May 9, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28498713/improved-sensing-with-a-single-qubit
#11
P Sekatski, M Skotiniotis, W Dür
We consider quantum metrology with arbitrary prior knowledge of the parameter. We demonstrate that a single sensing two-level system can act as a virtual multilevel system that offers increased sensitivity in a Bayesian single-shot metrology scenario, and that allows one to estimate (arbitrary) large parameter values by avoiding phase wraps. This is achieved by making use of additional degrees of freedom or auxiliary systems not participating in the sensing process. The joint system is manipulated by intermediate control operations in such a way that an effective Hamiltonian, with an arbitrary spectrum, is generated that mimics the spectrum of a multisystem interacting with the field...
April 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28472049/evaluation-of-a-novel-serious-game-based-assessment-tool-for-patients-with-alzheimer-s-disease
#12
Vanessa Vallejo, Patric Wyss, Luca Rampa, Andrei V Mitache, René M Müri, Urs P Mosimann, Tobias Nef
Despite growing interest in developing ecological assessment of difficulties in patients with Alzheimer's disease new methods assessing the cognitive difficulties related to functional activities are missing. To complete current evaluation, the use of Serious Games can be a promising approach as it offers the possibility to recreate a virtual environment with daily living activities and a precise and complete cognitive evaluation. The aim of the present study was to evaluate the usability and the screening potential of a new ecological tool for assessment of cognitive functions in patients with Alzheimer's disease...
2017: PloS One
https://www.readbyqxmd.com/read/28466361/virtual-reality-based-assessment-of-basic-laparoscopic-skills-using-the-leap-motion-controller
#13
Vasileios Lahanas, Constantinos Loukas, Konstantinos Georgiou, Hani Lababidi, Dania Al-Jaroudi
BACKGROUND: The majority of the current surgical simulators employ specialized sensory equipment for instrument tracking. The Leap Motion controller is a new device able to track linear objects with sub-millimeter accuracy. The aim of this study was to investigate the potential of a virtual reality (VR) simulator for assessment of basic laparoscopic skills, based on the low-cost Leap Motion controller. METHODS: A simple interface was constructed to simulate the insertion point of the instruments into the abdominal cavity...
May 2, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28463702/monitoring-of-bisphenol-a-and-bisphenol-s-in-thermal-paper-receipts-from-the-italian-market-and-estimated-transdermal-human-intake-a-pilot-study
#14
Giacomo Russo, Francesco Barbato, Lucia Grumetto
Bisphenol A (BPA), a synthetic xenoestrogen widely used in various industrial fields, can be present, in its un-reacted form, as an additive in thermal paper. BPA is virtually ubiquitous in industrialized societies and humans are exposed to this chemical via dietary and non-dietary sources. Since in 2015 European Food Safety Authority (EFSA) indicated that thermal paper is the second source of BPA exposure after the food chain, some suppliers replaced BPA with its analogue Bisphenol S (BPS), speculatively supposed to be safer...
April 29, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28454921/interpersonal-sensitivity-in-those-at-clinical-high-risk-for-psychosis-mediates-the-association-between-childhood-bullying-victimisation-and-paranoid-ideation-a-virtual-reality-study
#15
J McDonnell, D Stahl, F Day, P McGuire, L R Valmaggia
BACKGROUND: Experience of bullying victimisation in childhood and heightened interpersonal sensitivity have been independently linked to the clinical high risk for psychosis. AIM: To examine the potential mediating effect of interpersonal sensitivity in explaining the link between childhood bullying victimisation and real-time paranoid ideation in adult participants at clinical high risk for psychosis. METHOD: In a cross-sectional study data were collected for 64 individuals at clinical high risk for psychosis...
April 26, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28435854/a-clinical-trial-simulation-evaluating-epinephrine-pharmacokinetics-at-various-dosing-frequencies-during-cardiopulmonary-resuscitation
#16
Andy R Eugene
OBJECTIVE: This article seeks to test the hypothesis that repeated 1mg intravenous epinephrine dosing intervals of 3-minutes and 5-minutes results in differences in the total drug exposure and the maximum epinephrine concentration using simulated cardiopulmonary resuscitation (CPR) dosing. METHODS: Published population pharmacokinetic parameters were identified in the literature and pharmacokinetic dosing simulations were conducted according to the 2015 American Heart Association guidelines for CPR in adults...
June 2016: MEDtube Science
https://www.readbyqxmd.com/read/28430155/dynamic-construction-scheme-for-virtualization-security-service-in-software-defined-networks
#17
Zhaowen Lin, Dan Tao, Zhenji Wang
For a Software Defined Network (SDN), security is an important factor affecting its large-scale deployment. The existing security solutions for SDN mainly focus on the controller itself, which has to handle all the security protection tasks by using the programmability of the network. This will undoubtedly involve a heavy burden for the controller. More devastatingly, once the controller itself is attacked, the entire network will be paralyzed. Motivated by this, this paper proposes a novel security protection architecture for SDN...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28424602/assessing-the-driver-s-current-level-of-working-memory-load-with-high-density-functional-near-infrared-spectroscopy-a-realistic-driving-simulator-study
#18
Anirudh Unni, Klas Ihme, Meike Jipp, Jochem W Rieger
Cognitive overload or underload results in a decrease in human performance which may result in fatal incidents while driving. We envision that driver assistive systems which adapt their functionality to the driver's cognitive state could be a promising approach to reduce road accidents due to human errors. This research attempts to predict variations of cognitive working memory load levels in a natural driving scenario with multiple parallel tasks and to reveal predictive brain areas. We used a modified version of the n-back task to induce five different working memory load levels (from 0-back up to 4-back) forcing the participants to continuously update, memorize, and recall the previous 'n' speed sequences and adjust their speed accordingly while they drove for approximately 60 min on a highway with concurrent traffic in a virtual reality driving simulator...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28422323/validating-a-virtual-environment-for-sexual-assault-victims
#19
Claudie Loranger, Stéphane Bouchard
Virtual reality has shown promising results in the treatment of posttraumatic stress disorder (PTSD) for some traumatic experiences, but sexual assault has been understudied. One important question to address is the relevance and safety of a virtual environment (VE) allowing patients to be progressively exposed to a sexual assault scenario. The aim of this study was to validate such a VE. Thirty women (victims and nonvictims of sexual assault) were randomly assigned in a counter-balanced order to 2 immersions in a virtual bar: a control scenario where the encounter with the aggressor does not lead to sexual assault and an experimental scenario where the participant is assaulted...
April 2017: Journal of Traumatic Stress
https://www.readbyqxmd.com/read/28412441/noise-robust-cortical-tracking-of-attended-speech-in-real-world-acoustic-scenes
#20
Søren Asp Fuglsang, Torsten Dau, Jens Hjortkjær
Selectively attending to one speaker in a multi-speaker scenario is thought to synchronize low-frequency cortical activity to the attended speech signal. In recent studies, reconstruction of speech from single-trial electroencephalogram (EEG) data has been used to decode which talker a listener is attending to in a two-talker situation. It is currently unclear how this generalizes to more complex sound environments. Behaviorally, speech perception is robust to the acoustic distortions that listeners typically encounter in everyday life, but it is unknown whether this is mirrored by a noise-robust neural tracking of attended speech...
April 12, 2017: NeuroImage
keyword
keyword
8740
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"