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https://www.readbyqxmd.com/read/28821993/segmentation-of-breast-ultrasound-images-based-on-active-contours-using-neutrosophic-theory
#1
Mahsa Lotfollahi, Masoumeh Gity, Jing Yong Ye, A Mahlooji Far
PURPOSE: Ultrasound imaging is an effective approach for diagnosing breast cancer, but it is highly operator-dependent. Recent advances in computer-aided diagnosis have suggested that it can assist physicians in diagnosis. Definition of the region of interest before computer analysis is still needed. Since manual outlining of the tumor contour is tedious and time-consuming for a physician, developing an automatic segmentation method is important for clinical application. METHODS: The present paper represents a novel method to segment breast ultrasound images...
August 18, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28821822/bladder-cancer-treatment-response-assessment-in-ct-using-radiomics-with-deep-learning
#2
Kenny H Cha, Lubomir Hadjiiski, Heang-Ping Chan, Alon Z Weizer, Ajjai Alva, Richard H Cohan, Elaine M Caoili, Chintana Paramagul, Ravi K Samala
Cross-sectional X-ray imaging has become the standard for staging most solid organ malignancies. However, for some malignancies such as urinary bladder cancer, the ability to accurately assess local extent of the disease and understand response to systemic chemotherapy is limited with current imaging approaches. In this study, we explored the feasibility that radiomics-based predictive models using pre- and post-treatment computed tomography (CT) images might be able to distinguish between bladder cancers with and without complete chemotherapy responses...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28820594/on-the-restrained-proton-indicator-in-combined-quantum-mechanics-molecular-mechanics-dynamics-simulations-of-proton-transfer-through-a-carbon-nanotube
#3
Adam W Duster, Hai Lin
Recently, a collective variable "proton indicator" was purposed for tracking an excess proton solvated in bulk water in molecular dynamics simulations. In this work, we demonstrate the feasibility of utilizing the position of this proton indicator as a reaction coordinate to model an excess proton migrating through a hydrophobic carbon nanotube in combined quantum-mechanics/molecular-mechanics simulations. Our results indicate that applying a harmonic restraint to the proton indicator in the bulk solvent near the nanotube pore entrance leads to the recruitment of water molecules into the pore...
August 18, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28819988/behavior-change-following-hiv-diagnosis-findings-from-a-cohort-of-los-angeles-msm
#4
Pamina M Gorbach, Marjan Javanbakht, Robert K Bolan
The effect of an HIV diagnosis on subsequent behavior of men who have sex with men (MSM) remains unclear. From 2009 to 2012 the NIDA funded Metromates Study enrolled and followed for one year MSM seeking testing for HIV in Los Angeles, assessing those with new HIV diagnoses for acute/recent HIV infection. Behavioral data were collected via Computer-Assisted Self-Interview from 321 men of whom 125 were classified as recently HIV infected, 91 as not recently HIV infected, and 105 as HIV-negative. Differences over time between those with recent HIV infection, not recent HIV infection, and no HIV were evaluated using bivariate and multivariable analyses for repeat measures to assess associations between HIV group, behaviors and condomless receptive (CRAI), intersertive (CIAI), or any condomless anal intercourse (CAI)...
August 18, 2017: AIDS Care
https://www.readbyqxmd.com/read/28819922/therapeutic-alliance-client-need-for-approval-and-perfectionism-as-differential-moderators-of-response-to-ehealth-and-traditionally-delivered-treatments-for-comorbid-depression-and-substance-use-problems
#5
Frances J Kay-Lambkin, Amanda L Baker, Kerrin Palazzi, Terry J Lewin, Brian J Kelly
PURPOSE: This study sought to undertake an exploratory analysis of the impact of therapeutic alliance and dysfunctional attitudes (perfectionism and need for approval) on outcomes for participants receiving therapist-delivered and eHealth interventions for comorbid depression and alcohol/cannabis use problems. These factors have been shown in previous research to moderate response to psychological treatment for depression and related disorders. METHOD: Participants (N = 274) with concurrent depression and alcohol/cannabis misuse were randomized to 10 sessions of therapist-delivered cognitive behavior therapy/motivational interviewing (CBT/MI), computer-delivered CBT/MI with brief therapist assistance (SHADE CBT/MI), or supportive counseling (PCT)...
August 17, 2017: International Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/28819679/neuromuscular-electrical-stimulation-is-effective-in-strengthening-the-quadriceps-muscle-after-anterior-cruciate-ligament-surgery
#6
REVIEW
Annette V Hauger, M P Reiman, J M Bjordal, C Sheets, L Ledbetter, A P Goode
PURPOSE: Reduced ability to contract the quadriceps muscles is often found immediately following anterior cruciate ligament (ACL) surgery. This can lead to muscle atrophy and decreased function. Application of neuromuscular electrical stimulation (NMES) may be a useful adjunct intervention to ameliorate these deficits following ACL surgery. The purpose of this review was to determine whether NMES in addition to standard physical therapy is superior to standard physical therapy alone in improving quadriceps strength or physical function following ACL surgery...
August 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28819656/simulating-the-reactions-of-substituted-pyridinio-n-phosphonates-with-pyridine-as-a-model-for-biological-phosphoryl-transfer
#7
Anna Pabis, Nicholas H Williams, Shina C L Kamerlin
Phosphoryl transfer reactions can proceed through several plausible mechanisms, and the potential for both solvent and substrate-assisted pathways (involving proton transfer to the phosphoryl oxygens) complicates both experimental and computational interpretations. To avoid this problem, we have used electronic structure calculations to probe the mechanisms of the reactions of pyridinio-N-phosphonates with pyridine. These compounds avoid the additional complexity introduced by proton transfer between the nucleophile and the leaving group, while also serving as a valuable model for biological P-N cleavage...
August 18, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28819611/acute-stress-fracture-of-the-pelvis-after-total-hip-arthroplasty-a-case-report
#8
Oluwaseun Akinbo, Vineet Tyagi
INTRODUCTION: Acute hip pain following total hip arthroplasty (THA) could have numerous causes to include stress fracture of the pelvis. Stress fractures of the pelvis are rare and have been reported to involve the medial wall and the pubic ramus. A unique case is presented demonstrating the clinical presentation and management of an acute stress fracture of ilium and anterior column following a THA. CASE REPORT: A 72-year-old man underwent an uncomplicated right THA...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28819202/mechanism-of-transformation-in-mycobacteria-using-a-novel-shockwave-assisted-technique-driven-by-in-situ-generated-oxyhydrogen
#9
Akshay Datey, Janardhanraj Subburaj, Jagadeesh Gopalan, Dipshikha Chakravortty
We present a novel method for shockwave-assisted bacterial transformation using a miniature oxyhydrogen detonation-driven shock tube. We have obtained transformation efficiencies of about 1.28 × 10(6), 1.7 × 10(6), 5 × 10(6), 1 × 10(5), 1 × 10(5) and 2 × 10(5) transformants/µg of DNA for Escherichia coli, Salmonella Typhimurum, Pseudomonas aeruginosa, Mycobacterium smegmatis, Mycobacterium tuberculosis (Mtb) and Helicobacter pylori respectively using this method which are significantly higher than those obtained using conventional methods...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818053/the-impact-of-self-interviews-on-response-patterns-for-sensitive-topics-a-randomized-trial-of-electronic-delivery-methods-for-a-sexual-behaviour-questionnaire-in-rural-south-africa
#10
Guy Harling, Dumile Gumede, Tinofa Mutevedzi, Nuala McGrath, Janet Seeley, Deenan Pillay, Till W Bärnighausen, Abraham J Herbst
BACKGROUND: Self-interviews, where the respondent rather than the interviewer enters answers to questions, have been proposed as a way to reduce social desirability bias associated with interviewer-led interviews. Computer-assisted self-interviews (CASI) are commonly proposed since the computer programme can guide respondents; however they require both language and computer literacy. We evaluated the feasibility and acceptability of using electronic methods to administer quantitative sexual behaviour questionnaires in the Somkhele demographic surveillance area (DSA) in rural KwaZulu-Natal, South Africa...
August 17, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28817129/interproximal-papilla-stability-around-cad-cam-and-stock-abutments-in-anterior-regions-a-2-year-prospective-multicenter-cohort-study
#11
Diego Lops, Andrea Parpaiola, Gianluca Paniz, Luca Sbricoli, Vanessa Ruiz Magaz, Alvise Cenzi Venezze, Eriberto Bressan, Edoardo Stellini
The aim of this study was to compare the interproximal papilla stability of restorations supported by computer-aided design/computer-assisted manufacture (CAD/CAM) abutments to those supported by prefabricated stock abutments in anterior areas over a 2-year follow-up. Abutments were selected depending on implant inclination and thickness of buccal peri-implant soft tissues from the following: zirconia stock, titanium stock, zirconia CAD/CAM and titanium CAD/CAM. Differences between the height of the papilla tip were measured (REC)...
September 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28816406/phosphinous-acid-assisted-hydration-of-nitriles-understanding-the-controversial-reactivity-of-osmium-and-ruthenium-catalysts
#12
Rebeca González-Fernández, Pascale Crochet, Victorio Cadierno, M Isabel Menéndez, Ramón López
The synthesis and catalytic behaviour of the osmium(II) complexes [OsCl2(6-p-cymene)(PR2OH)] [R = Me (2a), Ph (2b), OMe (2c), OPh (2d)] in nitrile hydration reactions is presented. Among them, the best catalytic results were obtained with the phosphinous acid derivative [OsCl2(6-p-cymene)(PMe2OH)] (2a), which selectively provided the desired primary amides in excellent yields and short times at 80 ºC, employing directly water as solvent, and without the assistance of any basic additive (TOF values up to 200 h-1)...
August 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28815957/tailoring-hierarchical-zeolites-with-designed-cationic-surfactants-and-its-high-catalytic-performance
#13
Kai Zhang, Chao Li, Zewei Liu, Min Wang, Xin Yan, Hongxia Xi
Three hierarchical porous zeolites (H-*BEA, H-MTW and H-*MRE) were successfully synthesized with the assistant of designed cationic surfactants under hydrothermal synthesis conditions. The as-synthesized zeolite samples can be easily regulated by changing the number of long hydrophobic n-alkyl chains. Also, we investigated the relationship between the length of the surfactant and the formation of microporous structure of zeolite. Furthermore, alkylation of benzene with propene was performed as probe reaction to evaluate the catalytic performance of the synthesized hierarchical zeolites...
August 17, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28815397/detecting-and-accounting-for-multiple-sources-of-positional-variance-in-peak-list-registration-analysis-and-spin-system-grouping
#14
Andrey Smelter, Eric C Rouchka, Hunter N B Moseley
Peak lists derived from nuclear magnetic resonance (NMR) spectra are commonly used as input data for a variety of computer assisted and automated analyses. These include automated protein resonance assignment and protein structure calculation software tools. Prior to these analyses, peak lists must be aligned to each other and sets of related peaks must be grouped based on common chemical shift dimensions. Even when programs can perform peak grouping, they require the user to provide uniform match tolerances or use default values...
August 16, 2017: Journal of Biomolecular NMR
https://www.readbyqxmd.com/read/28815123/rapid-and-reusable-text-visualization-and-exploration-development-with-delve
#15
Daniel R Harris, Ramakanth Kavuluru, Jerzy W Jaromczyk, Todd R Johnson
We present DELVE (Document ExpLoration and Visualization Engine), a framework for developing interactive visualizations as modular Web-applications to assist researchers with exploratory literature search. The goal for web-applications driven by DELVE is to better satisfy the information needs of researchers and to help explore and understand the state of research in scientific liter ature by providing immersive visualizations that both contain facets and are driven by facets derived from the literature. We base our framework on principles from user-centered design and human-computer interaction (HCI)...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28814023/representing-high-dimensional-data-to-intelligent-prostheses-and-other-wearable-assistive-robots-a-first-comparison-of-tile-coding-and-selective-kanerva-coding
#16
Jaden B Travnik, Patrick M Pilarski
Prosthetic devices have advanced in their capabilities and in the number and type of sensors included in their design. As the space of sensorimotor data available to a conventional or machine learning prosthetic control system increases in dimensionality and complexity, it becomes increasingly important that this data be represented in a useful and computationally efficient way. Well structured sensory data allows prosthetic control systems to make informed, appropriate control decisions. In this study, we explore the impact that increased sensorimotor information has on current machine learning prosthetic control approaches...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814016/applying-a-soft-robotic-glove-as-assistive-device-and-training-tool-with-games-to-support-hand-function-after-stroke-preliminary-results-on-feasibility-and-potential-clinical-impact
#17
Gerdienke B Prange-Lasonder, Bob Radder, Anke I R Kottink, Alejandro Melendez-Calderon, Jaap H Buurke, Johan S Rietman
Recent technological developments regarding wearable soft-robotic devices extend beyond the current application of rehabilitation robotics and enable unobtrusive support of the arms and hands during daily activities. In this light, the HandinMind (HiM) system was developed, comprising a soft-robotic, grip supporting glove with an added computer gaming environment. The present study aims to gain first insight into the feasibility of clinical application of the HiM system and its potential impact. In order to do so, both the direct influence of the HiM system on hand function as assistive device and its therapeutic potential, of either assistive or therapeutic use, were explored...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813978/evaluation-of-3d-printed-anatomically-scalable-transfemoral-prosthetic-knee
#18
Tyagi Ramakrishnan, Millicent Schlafly, Kyle B Reed
This case study compares a transfemoral amputee's gait while using the existing Ossur Total Knee 2000 and our novel 3D printed anatomically scalable transfemoral prosthetic knee. The anatomically scalable transfemoral prosthetic knee is 3D printed out of a carbon-fiber and nylon composite that has a gear-mesh coupling with a hard-stop weight-actuated locking mechanism aided by a cross-linked four-bar spring mechanism. This design can be scaled using anatomical dimensions of a human femur and tibia to have a unique fit for each user...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813959/-wink-to-grasp-comparing-eye-voice-emg-gesture-control-of-grasp-with-soft-robotic-gloves
#19
Bernardo Noronha, Sabine Dziemian, Giuseppe A Zito, Charalambos Konnaris, A Aldo Faisal
The ability of robotic rehabilitation devices to support paralysed end-users is ultimately limited by the degree to which human-machine-interaction is designed to be effective and efficient in translating user intention into robotic action. Specifically, we evaluate the novel possibility of binocular eye-tracking technology to detect voluntary winks from involuntary blink commands, to establish winks as a novel low-latency control signal to trigger robotic action. By wearing binocular eye-tracking glasses we enable users to directly observe their environment or the actuator and trigger movement actions, without having to interact with a visual display unit or user interface...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813939/comparison-of-tongue-interface-with-keyboard-for-control-of-an-assistive-robotic-arm
#20
Lotte N S Andreasen Struijk, Romulus Lontis
This paper demonstrates how an assistive 6 DoF robotic arm with a gripper can be controlled manually using a tongue interface. The proposed method suggests that it possible for a user to manipulate the surroundings with his or her tongue using the inductive tongue control system as deployed in this study. The sensors of an inductive tongue-computer interface were mapped to the Cartesian control of an assistive robotic arm. The resulting control system was tested manually in order to compare manual control of the robot using a standard keyboard and using the tongue interface...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
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