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https://www.readbyqxmd.com/read/28632043/simultanagnosia-and-object-individuation
#1
Veronica Mazza
Simultanagnosic patients have difficulty in perceiving multiple objects when presented simultaneously. In this review article, I discuss how neuropsychological research on simultanagnosia has been inspirational for two interconnected lines of research related to the core mechanisms by which the visual system processes cluttered scenes. First, I review previous studies on enumeration tasks indicating that, despite their inability to identify multiple objects, simultanagnosic patients can enumerate up to 2-3 elements as efficiently as healthy individuals (the so-called "subitizing" phenomenon)...
June 6, 2017: Cognitive Neuropsychology
https://www.readbyqxmd.com/read/28622670/adaptive-clutter-demodulation-for-non-contrast-ultrasound-perfusion-imaging
#2
Jaime Tierney, Crystal Coolbaugh, Theodore Towse, Brett Byram
Conventional Doppler ultrasound is useful for visualizing fast blood flow in large resolvable vessels. However, frame rate and tissue clutter caused by movement of the patient or sonographer make visualizing slow flow with ultrasound difficult. Patient and sonographer motion causes spectral broadening of the clutter signal, which limits ultrasound's sensitivity to velocities greater than 5-10mm/s for typical clinical imaging frequencies. To address this, we propose a clutter filtering technique that may increase the sensitivity of Doppler measurements to at least as low as 0...
June 13, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28601822/effectiveness-of-a-workshop-on-decluttering-and-organising-programme-for-teens-and-middle-aged-adults-with-difficulty-decluttering-a-study-protocol-of-an-open-label-randomised-parallel-group-superiority-trial-in-japan
#3
Yasuko Aso, Kazue Yamaoka, Asuka Nemoto, Yuki Naganuma, Masashige Saito
INTRODUCTION: Hoarding disorder can cause problems with work performance, personal hygiene, health and well-being. The disorder is a growing social problem in Japan. Having difficulty discarding rubbish, decluttering and organising can signal a future hoarding disorder, and early intervention is important. We developed an educational workshop on decluttering and organising for teens and adults with difficulty organising. The objective of this study is to evaluate the effectiveness of a workshop for reducing clutter and improving quality of life among younger people with difficulty decluttering and organising...
June 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28587299/remote-sensing-image-change-detection-based-on-nsct-hmt-model-and-its-application
#4
Pengyun Chen, Yichen Zhang, Zhenhong Jia, Jie Yang, Nikola Kasabov
Traditional image change detection based on a non-subsampled contourlet transform always ignores the neighborhood information's relationship to the non-subsampled contourlet coefficients, and the detection results are susceptible to noise interference. To address these disadvantages, we propose a denoising method based on the non-subsampled contourlet transform domain that uses the Hidden Markov Tree model (NSCT-HMT) for change detection of remote sensing images. First, the ENVI software is used to calibrate the original remote sensing images...
June 6, 2017: Sensors
https://www.readbyqxmd.com/read/28575421/evidence-of-the-impact-of-the-truth-finishit-campaign
#5
Vallone Vallone, Cantrell Cantrell, Bennett Bennett, Smith Smith, Jessica Rath, Xiao Xiao, Greenberg Greenberg, Elizabeth C Hair
Introduction: Over the past decade, public education mass media campaigns have been shown to be successful in changing tobacco-related attitudes, intentions, and behaviors among youth and young adults. In 2014, the national truth® campaign re-launched a new phase of the campaign targeted at a broad audience of youth and young adults, aged 15-21, to help end the tobacco epidemic. Methods: The study sample for this analysis is drawn from the Truth Longitudinal Cohort (TLC), a probability-based, nationally representative cohort designed to evaluate the relationship between awareness of truth media messages and changes in targeted attitudes, beliefs, and behaviors over time...
June 2, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28574342/robust-3d-object-tracking-from-monocular-images-using-stable-parts
#6
Alberto Crivellaro, Mahdi Rad, Yannick Verdie, Kwang Moo Yi, Pascal Fua, Vincent Lepetit
We present an algorithm for estimating the pose of a rigid object in real-time under challenging conditions. Our method effectively handles poorly textured objects in cluttered, changing environments, even when their appearance is corrupted by large occlusions, and it relies on grayscale images to handle metallic environments on which depth cameras would fail. As a result, our method is suitable for practical Augmented Reality applications including industrial environments. At the core of our approach is a novel representation for the 3D pose of object parts: We predict the 3D pose of each part in the form of the 2D projections of a few control points...
May 26, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28571454/a-frequency-modulated-continuous-wave-reflectometer-for-the-lithium-tokamak-experiment
#7
S Kubota, R Majeski, W A Peebles, R E Bell, D P Boyle, R Kaita, T Kozub, M Lucia, E Merino, X V Nguyen, T L Rhodes, J C Schmitt
The frequency-modulated continuous-wave reflectometer on LTX (Lithium Tokamak Experiment) and the data analysis methods used for determining electron density profiles are described. The diagnostic uses a frequency range of 13.1-33.5 GHz, for covering a density range of 0.21-1.4×10(13) cm(-3) (in O-mode polarization) with a time resolution down to 8 μs. The design of the diagnostic incorporates the concept of an "optimized" source frequency sweep, which minimizes the large variation in the intermediate frequency signal due to a long dispersive transmission line...
May 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28560342/how-birds-direct-impulse-to-minimize-the-energetic-cost-of-foraging-flight
#8
Diana D Chin, David Lentink
Birds frequently hop and fly between tree branches to forage. To determine the mechanical energy trade-offs of their bimodal locomotion, we rewarded four Pacific parrotlets with a seed for flying voluntarily between instrumented perches inside a new aerodynamic force platform. By integrating direct measurements of both leg and wing forces with kinematics in a bimodal long jump and flight model, we discovered that parrotlets direct their leg impulse to minimize the mechanical energy needed to forage over different distances and inclinations...
May 2017: Science Advances
https://www.readbyqxmd.com/read/28533685/factor-structure-reliability-and-validity-of-the-japanese-version-of-the-hoarding-rating-scale-self-report-hrs-sr-j
#9
Aki Tsuchiyagaito, Satoshi Horiuchi, Toko Igarashi, Yoshiya Kawanori, Yoshiyuki Hirano, Hirooki Yabe, Akiko Nakagawa
BACKGROUND: The Hoarding Rating Scale-Self-Report (HRS-SR) is a five-item scale that assesses the symptoms of hoarding. These symptoms include excessive acquisition, difficulty in discarding, and excessive clutter that causes distress. We conducted three studies to examine the factor structure, reliability, and validity of the Japanese version of the HRS-SR (HRS-SR-J). METHODS: Study 1 examined its reliability; 193 college students and 320 adolescents and adults completed the HRS-SR-J and, of the college students, 32 took it again 2 weeks later...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28531135/aekf-slam-a-new-algorithm-for-robotic-underwater-navigation
#10
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/28505665/visual-wetness-perception-based-on-image-color-statistics
#11
Masataka Sawayama, Edward H Adelson, Shin'ya Nishida
Color vision provides humans and animals with the abilities to discriminate colors based on the wavelength composition of light and to determine the location and identity of objects of interest in cluttered scenes (e.g., ripe fruit among foliage). However, we argue that color vision can inform us about much more than color alone. Since a trichromatic image carries more information about the optical properties of a scene than a monochromatic image does, color can help us recognize complex material qualities...
May 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28491271/stereoscopic-segmentation-cues-improve-visual-timing-performance-in-spatiotemporally-cluttered-environments
#12
Daniel Talbot, Erik Van der Burg, John Cass
Recently, Cass and Van der Burg demonstrated that temporal order judgment (TOJ) precision could be profoundly impaired by the mere presence of dynamic visual clutter elsewhere in the visual field. This study examines whether presenting target and distractor objects in different depth planes might ameliorate this remote temporal camouflage (RTC) effect. TOJ thresholds were measured under static and dynamic (flickering) distractor conditions. In Experiment 1, targets were presented at zero, crossed, or uncrossed disparity, with distractors fixed at zero disparity...
March 2017: I-Perception
https://www.readbyqxmd.com/read/28458481/comparing-object-recognition-from-binary-and-bipolar-edge-images-for-visual-prostheses
#13
Jae-Hyun Jung, Tian Pu, Eli Peli
Visual prostheses require an effective representation method due to the limited display condition which has only 2 or 3 levels of grayscale in low resolution. Edges derived from abrupt luminance changes in images carry essential information for object recognition. Typical binary (black and white) edge images have been used to represent features to convey essential information. However, in scenes with a complex cluttered background, the recognition rate of the binary edge images by human observers is limited and additional information is required...
November 2016: Journal of Electronic Imaging
https://www.readbyqxmd.com/read/28452663/psychometric-evaluation-of-the-saving-inventory-revised-in-older-adults
#14
Catherine R Ayers, Mary E Dozier, Tina L Mayes
OBJECTIVES: Hoarding disorder (HD) is a chronic condition characterized by severe impairment in health and functioning for older adults. Researchers and clinicians commonly use the Saving Inventory-Revised (SI-R), a self-report measure validated for the assessment of HD, to establish symptom severity. This study represents the first evaluation of the psychometric properties of the SI-R in a sample of older adults with HD. METHODS: Participants were 156 older adults with HD and 23 older adults with no psychiatric diagnoses...
May 2017: Clinical Gerontologist
https://www.readbyqxmd.com/read/28448465/shadow-based-vehicle-detection-in-urban-traffic
#15
Manuel Ibarra-Arenado, Tardi Tjahjadi, Juan Pérez-Oria, Sandra Robla-Gómez, Agustín Jiménez-Avello
Vehicle detection is a fundamental task in Forward Collision Avoiding Systems (FACS). Generally, vision-based vehicle detection methods consist of two stages: hypotheses generation and hypotheses verification. In this paper, we focus on the former, presenting a feature-based method for on-road vehicle detection in urban traffic. Hypotheses for vehicle candidates are generated according to the shadow under the vehicles by comparing pixel properties across the vertical intensity gradients caused by shadows on the road, and followed by intensity thresholding and morphological discrimination...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28436232/safety-performance-and-satisfaction-outcomes-in-the-operating-room-a-literature-review
#16
Anjali Joseph, Sara Bayramzadeh, Zahra Zamani, Bill Rostenberg
OBJECTIVE: This review of empirical literature focuses on the design of operating rooms (ORs) by investigating the physical environmental features of ORs associated with patient and staff outcomes. BACKGROUND: Many ORs built more than 30 years ago remain operational today. However, most are inadequately designed to handle the equipment, processes, and people that a contemporary OR needs to accommodate. However, the evidence base for designing ORs has been sorely lacking, and little guidance exists on how OR design can improve safety and performance outcomes...
January 1, 2017: HERD
https://www.readbyqxmd.com/read/28433775/looking-is-buying-how-visual-attention-and-choice-are-affected-by-consumer-preferences-and-properties-of-the-supermarket-shelf
#17
Kerstin Gidlöf, Andrey Anikin, Martin Lingonblad, Annika Wallin
There is a battle in the supermarket isle, a battle between what the consumer wants and what the retailer and others want her to see, and subsequently to buy. Product packages and displays contain a number of features and attributes tailored to catch consumers' attention. These are what we call external factors comprising the visual saliency, the number of facings, and the placement of each product. But a consumer also brings with her a number of goals and interests related to the products and their attributes...
April 19, 2017: Appetite
https://www.readbyqxmd.com/read/28432139/feature-selective-attention-adaptively-shifts-noise-correlations-in-primary-auditory-cortex
#18
Joshua D Downer, Brittany Rapone, Jessica Verhein, Kevin N O'Connor, Mitchell L Sutter
Sensory environments often contain an overwhelming amount of information, with both relevant and irrelevant information competing for neural resources. Feature attention mediates this competition by selecting the sensory features needed to form a coherent percept. How attention affects the activity of populations of neurons to support this process is poorly understood because population coding is typically studied through simulations in which one sensory feature is encoded without competition. Therefore, to study the effects of feature attention on population-based neural coding, investigations must be extended to include stimuli with both relevant and irrelevant features...
May 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28425075/technical-note-real-time-web-based-wireless-visual-guidance-system-for-radiotherapy
#19
Danny Lee, Siyong Kim, Jatinder R Palta, Taeho Kim
Describe a Web-based wireless visual guidance system that mitigates issues associated with hard-wired audio-visual aided patient interactive motion management systems that are cumbersome to use in routine clinical practice. Web-based wireless visual display duplicates an existing visual display of a respiratory-motion management system for visual guidance. The visual display of the existing system is sent to legacy Web clients over a private wireless network, thereby allowing a wireless setting for real-time visual guidance...
April 19, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28419875/falls-in-people-with-parkinson-s-disease-a-prospective-comparison-of-community-and-home-based-falls
#20
Robyn M Lamont, Meg E Morris, Hylton B Menz, Jennifer L McGinley, Sandra G Brauer
BACKGROUND: Falls are common and debilitating in people with Parkinson's disease (PD) and restrict participation in daily activities. Understanding circumstances of falls in the community and at home may assist clinicians to target therapy more effectively. OBJECTIVE: To compare the characteristics of community and home fallers and the circumstances that contribute to falls in people living with PD. METHODS: People with mild-moderately severe PD (n=196) used a daily falls diary and telephone hotline to report prospectively the occurrence, location and circumstances of falls over 14 months...
April 4, 2017: Gait & Posture
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