keyword
MENU ▼
Read by QxMD icon Read
search

Force

keyword
https://www.readbyqxmd.com/read/28545281/-pre-and-post-orthotopic-heart-transplantation-electrocardiogram-characteristics-of-998-patients
#1
H Q Guan, Z J Chen, Y Zhou, J Liu, W X Sun, J Yuan, Y H Liao, N G Dong, J P Liu, K G Feng, Q Zhang, X Zhao, C Qian, F Hu
Objective: To analyze pre- and post-operation electrocardiograms (ECGs) features of patients underwent orthotopic heart transplantation (OHT), and provide evidences for identifying and analyzing post OHT ECGs. Methods: Nine hundreds and ninty-eight pre- and post- OHT standard 12-leads ECGs from 110 consecutive patients, who underwent OHT in our hospital from May 2008 to May 2014, were analyzed. Results: The mean heart rate(HR)was (86.9±16.4) beats per minute before OHT, and (100.0±0.4) beats per minute after OHT...
April 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28545245/multimodal-bio-inspired-tactile-sensing-module-for-surface-characterization
#2
Thiago Eustaquio Alves de Oliveira, Ana-Maria Cretu, Emil M Petriu
Robots are expected to recognize the properties of objects in order to handle them safely and efficiently in a variety of applications, such as health and elder care, manufacturing, or high-risk environments. This paper explores the issue of surface characterization by monitoring the signals acquired by a novel bio-inspired tactile probe in contact with ridged surfaces. The tactile module comprises a nine Degree of Freedom Microelectromechanical Magnetic, Angular Rate, and Gravity system (9-DOF MEMS MARG) and a deep MEMS pressure sensor embedded in a compliant structure that mimics the function and the organization of mechanoreceptors in human skin as well as the hardness of the human skin...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28545232/sensors-and-actuators-on-determining-parameters-for-being-considered-in-selection-of-elastomers-for-biomimetic-hands
#3
Vlad Cârlescu, Dumitru N Olaru, Gheorghe Prisăcaru, Cezar Oprişan, José Machado
In this paper, the authors present a new methodology to study the viscoelastic behaviour of the human finger. The methodology is based on experimental research consisting of a finger's indentation with a small steel cylindrical object for various indentation speeds. The tests were realized on a CETR UMT-2 Tribometer for indentation speed between 0.02 mm/s and 4 mm/s with a normal load of up to 22 N. Using the force-deformation diagrams recorded at the smallest indentation speed determined the elastic modulus of the human finger according to an adapted Hertzian model...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28545087/the-second-terminations-of-the-suboccipital-muscles-an-assistant-pivot-for-the-to-be-named-ligament
#4
Xiao-Ying Yuan, Chan Li, Jia-Ying Sui, Qi-Qi Zhao, Xiao Zhang, Na-Na Mou, Zhao Huang-Fu, Okoye Chukwuemeka Samuel, Nan Zheng, Seung-Ho Han, Sheng-Bo Yu, Hong-Jin Sui
In the last two decades, many studies have focused on the muscles and dense connective tissues located in the suboccipital region. Our study investigated the existence of the second terminations originating from the suboccipital muscles, and the relationship between the variable types of the To Be Named Ligament (TBNL). Anatomical dissection was performed on 35 head-neck specimens. The existence of the second terminations of the suboccipital muscles was confirmed and various types of the TBNL were observed in this study...
2017: PloS One
https://www.readbyqxmd.com/read/28545047/the-natural-history-of-varicella-zoster-virus-infection-in-norway-further-insights-on-exogenous-boosting-and-progressive-immunity-to-herpes-zoster
#5
Luigi Marangi, Grazina Mirinaviciute, Elmira Flem, Gianpaolo Scalia Tomba, Giorgio Guzzetta, Birgitte Freiesleben de Blasio, Piero Manfredi
We use age-structured models for VZV transmission and reactivation to reconstruct the natural history of VZV in Norway based on available pre-vaccination serological data, contact matrices, and herpes zoster incidence data. Depending on the hypotheses on contact and transmission patterns, the basic reproduction number of varicella in Norway ranges between 3.7 and 5.0, implying a vaccine coverage between 73 and 80% to effectively interrupt transmission with a 100% vaccine efficacy against infection. The varicella force of infection peaks during early childhood (3-5 yrs) and shows a prolonged phase of higher risk during the childbearing period, though quantitative variations can occur depending on contact patterns...
2017: PloS One
https://www.readbyqxmd.com/read/28545013/level-of-functioning-perceived-work-ability-and-work-status-among-psychiatric-patients-with-major-mental-disorders
#6
B Karpov, G Joffe, K Aaltonen, J Suvisaari, I Baryshnikov, P Näätänen, M Koivisto, T Melartin, J Oksanen, K Suominen, M Heikkinen, E Isometsä
BACKGROUND: Major mental disorders are highly disabling conditions that result in substantial socioeconomic burden. Subjective and objective measures of functioning or ability to work, their concordance, or risk factors for them may differ between disorders. METHODS: Self-reported level of functioning, perceived work ability, and current work status were evaluated among psychiatric care patients with schizophrenia or schizoaffective disorder (SSA, n=113), bipolar disorder (BD, n=99), or depressive disorder (DD, n=188) within the Helsinki University Psychiatric Consortium Study...
April 7, 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/28544961/superficial-physicochemical-properties-of-polyurethane-biomaterials-as-osteogenic-regulators-in-human-mesenchymal-stem-cells-fates
#7
Mohsen Shahrousvand, Gity Mir Mohamad Sadeghi, Ehsan Shahrousvand, Marzieh Ghollasi, Ali Salimi
All of the cells' interactions are done through their surfaces. Evaluation of surface physicochemical scaffolds along with other factors is important and determines the fate of stem cells. In this work, biodegradable and biocompatible polyester/polyether based polyurethanes (PUs) were synthesized by polycaprolactone diol (PCL) and poly (tetra methylene ether) glycol (PTMEG) as the soft segment. To assess better the impact of surface parameters such as stiffness and roughness effects on osteogenic differentiation of the human mesenchymal stem cell (hMSC), the dimension effect of substrates was eliminated and two-dimensional membranes were produced by synthesized polyurethane...
May 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28544950/the-influence-of-continuous-versus-interval-walking-exercise-on-knee-joint-loading-and-pain-in-patients-with-knee-osteoarthritis
#8
Shawn Farrokhi, Prakash Jayabalan, Jonathan A Gustafson, Brian A Klatt, Gwendolyn A Sowa, Sara R Piva
OBJECTIVE: To evaluate whether knee contact force and knee pain are different between continuous and interval walking exercise in patients with knee osteoarthritis (OA). METHODS: Twenty seven patients with unilateral symptomatic knee OA completed two separate walking exercise sessions on a treadmill at 1.3m/s on two different days: 1) a continuous 45min walking exercise session, and 2) three 15min bouts of walking exercise separated by 1h rest periods for a total of 45min of exercise in an interval format...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544949/the-influence-of-shoe-aging-on-children-running-biomechanics
#9
Alexis Herbaut, Pascale Chavet, Maxime Roux, Nils Guéguen, Franck Barbier, Emilie Simoneau-Buessinger
Athletic children are prone to overuse injuries, especially at the heel and knee. Since footwear is an extrinsic factor of lower limb injury risk, the aim of this study was to assess the influence of shoe aging on children running biomechanics. Fourteen children active in sports participated in a laboratory biomechanical evaluation. A new pair of shoes was provided to each participant at an inclusion visit. Four months later, the participants performed a running task and their kinematics and kinetics were assessed both with their used shoes and with a new pair of shoes identical to the first...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544941/time-based-expectations-entail-preparatory-motor-activity
#10
Gregor Volberg, Roland Thomaschke
Human behavior is guided by expectations that facilitate perception of upcoming events or reaction to them. In natural settings expectations are often implicitly based on time, e.g., when making a phone call one would expect to hear either a person answering (earlier) or a voicemail greeting (later). We investigated how time-based expectations can improve performance in the absence of explicit prior information on the pending stimulus or the associated response. Visual stimuli were presented after a characteristic short or long foreperiod, and a forced-choice categorization using either the left or the right hand was required...
May 4, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28544871/signs-of-social-class-the-experience-of-economic-inequality-in-everyday-life
#11
Michael W Kraus, Jun Won Park, Jacinth J X Tan
By some accounts, global economic inequality is at its highest point on record. The pernicious effects of this broad societal trend are striking: Rising inequality is linked to poorer health and well-being across countries, continents, and cultures. The economic and psychological forces that perpetuate inequality continue to be studied, and in this theoretical review, we examine the role of daily experiences of economic inequality-the communication of social class signals between interaction partners-in this process...
May 2017: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
https://www.readbyqxmd.com/read/28544869/restoring-agency-to-the-human-actor
#12
William B Swann, Jolanda Jetten
A cursory read of the social psychological literature suggests that when people find themselves in strong situations, they fail to display agency. The early classic studies of conformity, obedience, and bystander intervention, for example, are renowned for showing that when challenged by strong situational pressures, participants acquiesced-even if it meant abandoning their moral principles or disregarding their own sensory data. Later studies of learned helplessness, ego depletion, and stereotype threat echoed this "power of the situation" theme, demonstrating that exposure to (or the expectation of) a frustrating or unpleasant experience suppressed subsequent efforts to actualize goals and abilities...
May 2017: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
https://www.readbyqxmd.com/read/28544862/narcissistic-force-meets-systemic-resistance-the-energy-clash-model
#13
Constantine Sedikides, W Keith Campbell
This article focuses on the interplay between narcissistic leaders and organizations. It attempts to capture the gist of this interplay with a model outlining the narcissistic organizational trajectory. The Energy Clash Model borrows and adapts a phase/state physics metaphor to conceptualize narcissism as a force that enters or emerges in a stable system (i.e., organization) as a leader, destabilizes it, and stabilizes it at a different state or is expelled. The model consists of three time-contingent phases: perturbation, conflict, and resolution...
May 2017: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
https://www.readbyqxmd.com/read/28544833/how-heart-valves-evolve-to-adapt-to-an-extreme-pressure-system-morphologic-and-biomechanical-properties-of-giraffe-heart-valves
#14
Jonas Amstrup Funder, Carl Christian Danielsen, Ulrik Baandrup, Bo Martin Bibby, Ted Carl Andelius, Emil Toft Brøndum, Tobias Wang, J Michael Hasenkam
BACKGROUND: Heart valves which exist naturally in an extreme-pressure system must have evolved in a way to resist the stresses of high pressure. Giraffes are interesting as they naturally have a blood pressure twice that of humans. Thus, knowledge regarding giraffe heart valves may aid in developing techniques to design improved pressure-resistant biological heart valves. METHODS: Heart valves from 12 giraffes and 10 calves were explanted and subjected to either biomechanical or morphological examinations...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544505/understanding-the-mechanisms-of-gold-shell-growth-onto-polymer-microcapsules-to-control-shell-thickness
#15
Alison Louise Tasker, James Hitchcock, Elaine Alice Baxter, Olivier Cayre, Simon Biggs
Polymer microcapsules have been used commercially for decades, however they have an inherent flaw which renders them impractical as a carrier of small, volatile molecules. The porous nature of the polymer shell allows for diffusion of the encapsulated molecules into the bulk. The use of metal shells is an innovative way to prevent undesired loss of small molecules from the core of microcapsules, however it is important, particularly when using expensive metals to ensure that the resulting shell is as thin as possible...
May 21, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28544447/modulation-of-wetting-gradients-by-tuning-the-interplay-between-surface-structuration-and-anisotropic-molecular-layers-with-bipolar-electrochemistry
#16
Laurent Bouffier, Stéphane Reculusa, Valérie Ravaine, Alexander Kuhn
A new simple and versatile method for the preparation of surface wetting gradients is proposed. It is based on the combination of electrode surface structuration introduced by a sacrificial template approach and the formation of a tuneable molecular gradient by bipolar electrochemistry. The gradient involves the formation of a self-assembled monolayer on gold surface by selecting an appropriate thiol molecule and the subsequent reductive desorption by means of bipolar electrochemistry. Under these conditions, the completion of the reductive desorption process evolves along the bipolar surface with a maximum strength localized at the cathodic edge and a decreasing driving force toward the middle of the surface...
May 22, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28544415/inertial-microfluidic-cell-stretcher-imcs-fully-automated-high-throughput-and-near-real-time-cell-mechanotyping
#17
Yanxiang Deng, Steven P Davis, Fan Yang, Kevin S Paulsen, Maneesh Kumar, Rebecca Sinnott DeVaux, Xianhui Wang, Douglas S Conklin, Assad Oberai, Jason I Herschkowitz, Aram J Chung
Mechanical biomarkers associated with cytoskeletal structures have been reported as powerful label-free cell state identifiers. In order to measure cell mechanical properties, traditional biophysical (e.g., atomic force microscopy, micropipette aspiration, optical stretchers) and microfluidic approaches were mainly employed; however, they critically suffer from low-throughput, low-sensitivity, and/or time-consuming and labor-intensive processes, not allowing techniques to be practically used for cell biology research applications...
May 23, 2017: Small
https://www.readbyqxmd.com/read/28544316/negating-the-fulcrum-effect-in-manual-laparoscopic-surgery-investigating-skill-acquisition-with-a-haptic-simulator
#18
Adam J Spiers, Sarah Baillie, Tony G Pipe, George Asimakopolous
BACKGROUND: Manual laparoscopic surgery requires extensive training and familiarization. It has been suggested that motion inversion caused by the 'fulcrum effect' is key to motor challenges. We investigate the potential of a conceptual semi-robotic handheld tool that negates natural inversion. METHODS: A custom laparoscopic simulator with haptic feedback was developed to allow interactive evaluation of the conceptual tool via virtual prototyping, prior to fabricating a physical prototype...
May 23, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28544269/a-novel-approach-for-early-evaluation-of-orthodontic-process-by-a-numerical-thermo-mechanical-analysis
#19
Z Heidary, A Mojra, M Shirazi, M Bazargan
The main objective of this paper is to propose a novel method that provides an opportunity to evaluate an orthodontic process at early phase of the treatment. This was accomplished by finding out a correlation between the applied orthodontic force and thermal variations in the tooth structure. To this end, geometry of the human tooth surrounded by the connective soft tissue called the periodontal ligament and the bone was constructed by employing dental CT scan images of a specific case. The periodontal ligament was modeled by finite strain viscoelastic model through a nonlinear stress-strain relation (hyperelasticity) and nonlinear stress-time relation (viscoelasticity)...
May 21, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28544048/use-of-electronic-health-record-clinical-decision-support-tool-for-hcv-birth-cohort-screening
#20
David N Fitch, Ajay Dharod, Claudia L Campos, Marina Núñez
The United States Preventive Services Task Force (USPSTF) recommended one-time HCV testing for all patients in the 1945-1965 birth cohort, given the high hepatitis C virus (HCV) prevalence in this group [1]. In response, various interventions differing in complexity and cost have been developed. Goel et al, evaluated a multifaceted intervention sequentially implemented and report poor response to the electronic health record (EHR) alert and a very successful HCV screening, increased by 137%, after adding other tools including physician education, data feedback, and patient navigation [2]...
May 24, 2017: Journal of Viral Hepatitis
keyword
keyword
106801
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"