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https://www.readbyqxmd.com/read/28430119/influence-of-wind-speed-on-rgb-d-images-in-tree-plantations
#1
Dionisio Andújar, José Dorado, José María Bengochea-Guevara, Jesús Conesa-Muñoz, César Fernández-Quintanilla, Ángela Ribeiro
Weather conditions can affect sensors' readings when sampling outdoors. Although sensors are usually set up covering a wide range of conditions, their operational range must be established. In recent years, depth cameras have been shown as a promising tool for plant phenotyping and other related uses. However, the use of these devices is still challenged by prevailing field conditions. Although the influence of lighting conditions on the performance of these cameras has already been established, the effect of wind is still unknown...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28418751/influence-of-exergaming-on-the-perception-of-cancer-related-fatigue
#2
Ricardo da Silva Alves, Denise Hollanda Iunes, Isabela Carvalho Pereira, Juliana Bassalobre Carvalho Borges, Denismar Alves Nogueira, Andreia Maria Silva, Daniel Ferreira Moreira Lobato, Leonardo Cesar Carvalho
OBJECTIVE: Exercise is recommended for cancer patients to reduce fatigue and improve quality of life. This study's aim is to evaluate the influence of an exergaming protocol on cancer-related fatigue, muscle fatigue, and muscle strength in cancer patients. MATERIALS AND METHODS: We conducted a quasi-experimental control study using exergaming in all groups through an Xbox360 Kinect™ console, two to three times per week, for 20 sessions. Three groups were created: cancer patients in chemotherapy and/or radiotherapy group (CRG; n:15), cancer patients after chemotherapy and/or radiotherapy (CAG; n:15), and a control group (CG; n:15)...
April 2017: Games for Health
https://www.readbyqxmd.com/read/28415258/fluctuations-around-mean-walking-behaviors-in-diluted-pedestrian-flows
#3
Alessandro Corbetta, Chung-Min Lee, Roberto Benzi, Adrian Muntean, Federico Toschi
Understanding and modeling the dynamics of pedestrian crowds can help with designing and increasing the safety of civil facilities. A key feature of a crowd is its intrinsic stochasticity, appearing even under very diluted conditions, due to the variability in individual behaviors. Individual stochasticity becomes even more important under densely crowded conditions, since it can be nonlinearly magnified and may lead to potentially dangerous collective behaviors. To understand quantitatively crowd stochasticity, we study the real-life dynamics of a large ensemble of pedestrians walking undisturbed, and we perform a statistical analysis of the fully resolved pedestrian trajectories obtained by a yearlong high-resolution measurement campaign...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28410413/validation-of-enhanced-kinect-sensor-based-motion-capturing-for-gait-assessment
#4
Björn Müller, Winfried Ilg, Martin A Giese, Nicolas Ludolph
Optical motion capturing systems are expensive and require substantial dedicated space to be set up. On the other hand, they provide unsurpassed accuracy and reliability. In many situations however flexibility is required and the motion capturing system can only temporarily be placed. The Microsoft Kinect v2 sensor is comparatively cheap and with respect to gait analysis promising results have been published. We here present a motion capturing system that is easy to set up, flexible with respect to the sensor locations and delivers high accuracy in gait parameters comparable to a gold standard motion capturing system (VICON)...
2017: PloS One
https://www.readbyqxmd.com/read/28408157/microsoft-kinect-can-distinguish-differences-in-over-ground-gait-between-older-persons-with-and-without-parkinson-s-disease
#5
Moataz Eltoukhy, Christopher Kuenze, Jeonghoon Oh, Marco Jacopetti, Savannah Wooten, Joseph Signorile
Gait patterns differ between healthy elders and those with Parkinson's disease (PD). A simple, low-cost clinical tool that can evaluate kinematic differences between these populations would be invaluable diagnostically; since gait analysis in a clinical setting is impractical due to cost and technical expertise. This study investigated the between group differences between the Kinect and a 3D movement analysis system (BTS) and reported validity and reliability of the Kinect v2 sensor for gait analysis. Nineteen subjects participated, eleven without (C) and eight with PD (PD)...
April 10, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28404690/pharmacologic-characterization-of-valbenazine-nbi-98854-and-its-metabolites
#6
Dimitri E Grigoriadis, Evan Smith, Sam R J Hoare, Ajay Madan, Haig Bozigian
The vesicular monoamine transporter 2 (VMAT2) is an integral presynaptic protein that regulates the packaging and subsequent release of dopamine and other monoamines from neuronal vesicles into the synapse. Valbenazine (NBI-98854), a novel compound that selectively inhibits VMAT2, is being developed for the treatment of tardive dyskinesia. Valbenazine is converted to two significant circulating metabolites in vivo, namely, (+)-α-dihydrotetrabenazine (R,R,R-DHTBZ) and a mono-oxy metabolite, NBI-136110. Radioligand binding studies were conducted to assess and compare valbenazine, tetrabenazine and their respective metabolites in their abilities to selectively and potently inhibit [(3)H]-DHTBZ binding to VMAT2 in rat striatal, rat forebrain, and human platelet homogenates...
April 12, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28400984/is-technology-present-in-frailty-technology-a-back-up-tool-for-dealing-with-frailty-in-the-elderly-a-systematic-review
#7
REVIEW
Iranzu Mugueta-Aguinaga, Begonya Garcia-Zapirain
This study analyzes the technologies used in dealing with frailty within the following areas: prevention, care, diagnosis and treatment. The aim of this paper is, on the one hand, to analyze the extent to which technology is present in terms of its relationship with frailty and what technological resources are used to treat it. Its other purpose is to define new challenges and contributions made by physiotherapy using technology. Eighty documents related to research, validation and/or the ascertaining of different types of hardware, software or both were reviewed in prominent areas...
April 2017: Aging and Disease
https://www.readbyqxmd.com/read/28398175/interactive-design-of-patient-oriented-video-games-for-rehabilitation-concept-and-application
#8
Giorgia Lupinacci, Gianluca Gatti, Corrado Melegari, Saverio Fontana
PURPOSE: Serious video-games are innovative tools used to train the motor skills of subjects affected by neurological disorders. They are often developed to train a specific type of patients and the rules of the game are standardly defined. A system that allows the therapist to design highly patient-oriented video-games, without specific informatics skills, is proposed. METHOD: The system consists of one personal computer, two screens, a Kinect™ sensor and a specific software developed here for the design of the video-games...
April 11, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28397759/a-high-spatial-resolution-depth-sensing-method-based-on-binocular-structured-light
#9
Huimin Yao, Chenyang Ge, Jianru Xue, Nanning Zheng
Depth information has been used in many fields because of its low cost and easy availability, since the Microsoft Kinect was released. However, the Kinect and Kinect-like RGB-D sensors show limited performance in certain applications and place high demands on accuracy and robustness of depth information. In this paper, we propose a depth sensing system that contains a laser projector similar to that used in the Kinect, and two infrared cameras located on both sides of the laser projector, to obtain higher spatial resolution depth information...
April 8, 2017: Sensors
https://www.readbyqxmd.com/read/28395854/using-the-microsoft-kinect%C3%A2-to-assess-3-d-shoulder-kinematics-during-computer-use
#10
Xu Xu, Michelle Robertson, Karen B Chen, Jia-Hua Lin, Raymond W McGorry
Shoulder joint kinematics has been used as a representative indicator to investigate musculoskeletal symptoms among computer users for office ergonomics studies. The traditional measurement of shoulder kinematics normally requires a laboratory-based motion tracking system which limits the field studies. In the current study, a portable, low cost, and marker-less Microsoft Kinect™ sensor was examined for its feasibility on shoulder kinematics measurement during computer tasks. Eleven healthy participants performed a standardized computer task, and their shoulder kinematics data were measured by a Kinect sensor and a motion tracking system concurrently...
April 7, 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28391197/virtual-character-animation-based-on-affordable-motion-capture-and-reconfigurable-tangible-interfaces
#11
Fabrizio Lamberti, Gianluca Paravati, Valentina Gatteschi, Alberto Cannavo, Paolo Montuschi
Software for computer animation is generally characterized by a steep learning curve, due to the entanglement of both sophisticated techniques and interaction methods required to control 3D geometries. This paper proposes a tool designed to support computer animation production processes by leveraging the affordances offered by articulated tangible user interfaces and motion capture retargeting solutions. To this aim, orientations of an instrumented prop are recorded together with animator's motion in the 3D space and used to quickly pose characters in the virtual environment...
April 3, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28378281/using-a-kinect-sensor-to-acquire-biological-motion-toolbox-and-evaluation
#12
Yanwei Shi, Xiaochi Ma, Zheng Ma, Jiahuan Wang, Nailang Yao, Quan Gu, Ci Wang, Zaifeng Gao
Biological motion (BM) is the movement of animate entities, which conveys rich social information. To obtain pure BM, researchers nowadays predominantly use point-light displays (PLDs), which depict BM through a set of light points (e.g., 12 points) placed at distinct joints of a moving human body. Most prevalent BM stimuli are created by state-of-the-art motion capture systems. Although these stimuli are highly precise, the motion capture system is expensive and bulky, and its process of constructing a PLD-based BM is time-consuming and complex...
April 4, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28375644/physical-activity-levels-in-children-with-and-without-autism-spectrum-disorder-when-playing-active-and-sedentary-xbox-kinect-videogames
#13
Daphne Golden, Nancy Getchell
OBJECTIVE: We compare physical activity during bouts of sedentary videogaming (SVG), active videogaming (AVG), and paced walking in children with and without autism spectrum disorder (ASD) to determine the effectiveness of AVG in providing moderate-to-vigorous physical activity. MATERIALS AND METHOD: Participants included nine males (8-11 years old) with ASD and eight age-matched males who were typically developing. Both groups had anthropometric and motor proficiency (Movement Assessment Battery for Children II) measures taken before testing...
April 2017: Games for Health
https://www.readbyqxmd.com/read/28370061/implementation-of-facial-recognition-with-microsoft-kinect-v2-sensor-for-patient-verification
#14
Evan Silverstein, Michael Snyder
PURPOSE: To present a straightforward implementation of facial recognition using the Microsoft Kinect v2 sensor for the purpose of patient identification in a radiotherapy setting. MATERIALS AND METHODS: A facial recognition system was created with the Microsoft Kinect v2 using a facial mapping library distributed with the Kinect v2 SDK as a basis for the algorithm. The system extracts 31 fiducial points representing various facial landmarks which are used in both the creation of a reference data set and subsequent evaluations of real-time sensor data in the matching algorithm...
March 30, 2017: Medical Physics
https://www.readbyqxmd.com/read/28368842/robust-gait-recognition-by-integrating-inertial-and-rgbd-sensors
#15
Qin Zou, Lihao Ni, Qian Wang, Qingquan Li, Song Wang
Gait has been considered as a promising and unique biometric for person identification. Traditionally, gait data are collected using either color sensors, such as a CCD camera, depth sensors, such as a Microsoft Kinect, or inertial sensors, such as an accelerometer. However, a single type of sensors may only capture part of the dynamic gait features and make the gait recognition sensitive to complex covariate conditions, leading to fragile gait-based person identification systems. In this paper, we propose to combine all three types of sensors for gait data collection and gait recognition, which can be used for important identification applications, such as identity recognition to access a restricted building or area...
March 29, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28368350/depth-edge-filtering-using-parameterized-structured-light-imaging
#16
Ziqi Zheng, Seho Bae, Juneho Yi
This research features parameterized depth edge detection using structured light imaging that exploits a single color stripes pattern and an associated binary stripes pattern. By parameterized depth edge detection, we refer to the detection of all depth edges in a given range of distances with depth difference greater or equal to a specific value. While previous research has not properly dealt with shadow regions, which result in double edges, we effectively remove shadow regions using statistical learning through effective identification of color stripes in the structured light images...
April 3, 2017: Sensors
https://www.readbyqxmd.com/read/28349758/use-of-natural-user-interfaces-for-image-navigation-during-laparoscopic-surgery-initial-experience
#17
Francisco M Sánchez-Margallo, Juan A Sánchez-Margallo, José L Moyano-Cuevas, Eva María Pérez, Juan Maestre
BACKGROUND: Surgical environments require special aseptic conditions for direct interaction with the preoperative images. We aim to test the feasibility of using a set of gesture control sensors combined with voice control to interact in a sterile manner with preoperative information and an integrated operating room (OR) during laparoscopic surgery. MATERIAL AND METHODS: Two hepatectomies and two partial nephrectomies were performed by three experienced surgeons in a porcine model...
March 28, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28343334/design-and-test-of-a-microsoft-kinect-based-system-for-delivering-adaptive-visual-feedback-to-stroke-patients-during-training-of-upper-limb-movement
#18
Daniel Simonsen, Mirjana B Popovic, Erika G Spaich, Ole Kæseler Andersen
The present paper describes the design and test of a low-cost Microsoft Kinect-based system for delivering adaptive visual feedback to stroke patients during the execution of an upper limb exercise. Eleven sub-acute stroke patients with varying degrees of upper limb function were recruited. Each subject participated in a control session (repeated twice) and a feedback session (repeated twice). In each session, the subjects were presented with a rectangular pattern displayed on a vertical mounted monitor embedded in the table in front of the patient...
March 25, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28340371/walking-adaptability-assessments-with-the-interactive-walkway-between-systems-agreement-and-sensitivity-to-task-and-subject-variations
#19
Daphne J Geerse, Bert H Coolen, Melvyn Roerdink
The ability to adapt walking to environmental circumstances is an important aspect of walking, yet difficult to assess. The Interactive Walkway was developed to assess walking adaptability by augmenting a multi-Kinect-v2 10-m walkway with gait-dependent visual context (stepping targets, obstacles) using real-time processed markerless full-body kinematics. In this study we determined Interactive Walkway's usability for walking-adaptability assessments in terms of between-systems agreement and sensitivity to task and subject variations...
March 2, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28333650/validation-of-static-and-dynamic-balance-assessment-using-microsoft-kinect-for-young-and-elderly-populations
#20
Moataz Eltoukhy, Christopher Kuenze, Jeonghoon Oh, Joseph Signorile
Reduction in balance is an indicator of fall risk, and therefore, an accurate and cost effective balance assessment tool is essential for prescribing effective postural control strategies. This study established the validity of the Kinect v2 sensor in assessing center of mass (CoM) excursion and velocity during single leg balance and voluntary ankle sway tasks among young and elderly subjects. We compared balance outcome measures (anteroposterior (AP) and mediolateral (ML) CoM excursion and velocity and average sway length) to a traditional three-dimensional motion analysis system...
March 22, 2017: IEEE Journal of Biomedical and Health Informatics
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