Predicting propulsive forces using distributed sensors in a compliant, high DOF, robotic fin

Engineered robotic fins have adapted principles of propulsion from bony-finned fish, using spatially-varying compliance and complex kinematics to produce and control the fin’s propulsive force through time. While methods of force production are well understood, few models exist to predict the propulsive forces of a compliant, high degree of freedom, robotic fin as it moves through fluid. Inspired by evidence that the bluegill sunfish ( Lepomis macrochirus ) has bending sensation in its pectoral fins, the objective of this study is to understand how sensors distributed within a compliant robotic fin can be used to estimate and predict the fin’s propulsive force. A biorobotic model of a bluegill sunfish pectoral fin was instrumented with pressure and bending sensors at multiple locations. Experiments with the robotic fin were executed that varied the swimming gait, flapping frequency, stroke phase, and fin stiffness to understand the forces and sensory measures that occur duri...
Source: Bioinspiration and Biomimetics - Category: Science Authors: Source Type: research

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This study was designed to examine the influence of perceived social support (emotional and informational, tangible, affectionate, and positive social interaction), stress level, and functional independence on depressive symptoms in survivors of stroke. Methods A cross-sectional observational study design in outpatient settings and rehabilitation centers was conducted. A convenience sample of 135 survivors of stroke completed the psychometrically valid instruments. Results Most of the sample had mild or moderate depressive symptoms (26% and 29%, respectively). The mean score for perceived social support was 7...
Source: Journal of Nursing Research - Category: Nursing Tags: ORIGINAL ARTICLES Source Type: research
In conclusion, senolytic drugs have shown promising results in the elimination of senescent cells and in alleviating various diseases in animal models. However, in patients, there is a paucity in data on the efficacy and safety of senotherapeutics from clinical trials, including systemic effects and side-effects. In this regard it is important to assess the specificity of senolytics in killing targeted senescent cells and their cytotoxic effects, to identify reliable markers for intervention responses, to elucidate interactions with comorbidities and other drugs, and to standardise administration protocols. FOXO3...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
Blood pressure details the force of your blood against your arteries. If this force becomes high enough, it can lead to health problems, such as heart attacks and strokes. The good news is that simple lifestyle interventions can lower this force. This includes a popular breakfast drink that could lower high blood pressure by as much as cutting down on salt.
Source: Daily Express - Health - Category: Consumer Health News Source Type: news
AbstractAfter a cerebral hemorrhage (intracerebral, subarachnoid, and intraventricular), extravasated blood contributes to both initial brain injury, via physical disruption and mass effect, and secondary injury, through the release of potentially neurotoxic and pro-inflammatory factors such as hemoglobin, iron, and peroxiredoxin-2. Erythrocytes are a major blood component and are a source of such damaging factors. Erythrolysis after cerebral hemorrhage releases potential neurotoxins, contributing to brain injury and edema. Alternatively, erythrocyte phagocytosis via microglia or macrophages may limit the spill of neurotox...
Source: Translational Stroke Research - Category: Neurology Source Type: research
AbstractAtrial fibrillation (AF) is the most common sustained cardiac arrhythmia, which has been increasing dramatically. AF has unfavorable consequences, such as stroke, heart failure, and cardiovascular death. Of these, stroke has been considered to be the serious complication. Recently, direct oral anticoagulation or new technologies, such as the WATCHMAN left atrium (LA) appendage closure device, have emerged to prevent stroke. Therefore, the accurate estimation of thromboembolic risk and appropriate prevention are essential for high-risk patients with AF. Although CHADS2 and CHA2DS2-VASc scores has been widely used to...
Source: Journal of Echocardiography - Category: Cardiology Source Type: research
“Normally, when a child is missing that much brain, it’s bad,” says the doctor who diagnosed him as having suffered a perinatal stroke. But his brain was able to remap itself.
Source: Washington Post: To Your Health - Category: Consumer Health News Authors: Source Type: news
Mil Med. 2022 Jan 22:usab564. doi: 10.1093/milmed/usab564. Online ahead of print.ABSTRACTMoyamoya is a rare and progressive cerebrovascular disease involving collateral small vessel formation associated with intracranial artery narrowing. It is a disease that frequently presents with stroke and transient ischemic attacks and has potential to affect our active duty service members and their families with its bimodal age of onset of 10 and 40. This case report describes a soldier with moyamoya whose diagnosis was unrecognized for over a year after seeing multiple medical providers regarding his symptoms. The goal of this cas...
Source: Military Medicine - Category: International Medicine & Public Health Authors: Source Type: research
Exp Brain Res. 2022 Jan 22. doi: 10.1007/s00221-022-06307-9. Online ahead of print.ABSTRACTCortical spreading depression or CSD is an electrophysiological phenomenon affecting various perspectives of brain physiology such as ionic balance, neurotransmitter level, and blood flow in the brain. This phenomenon has greater impact on the brain function and results in the pathological contribution of many diseases in humans such as migraine with aura, stroke, and traumatic brain injury. Various factors such as nutrition, stress, sleep, age, alcohol, inflammation and oxidative stress worsen the condition and affect CSD susceptibi...
Source: Experimental Brain Research - Category: Neuroscience Authors: Source Type: research
Stud Health Technol Inform. 2022 Jan 14;289:439-442. doi: 10.3233/SHTI210952.ABSTRACTThe aim of this study was to calculate the average operational cost per sub-type of stroke patient and to investigate cost drivers (e.g. ALoS, NIHSS score, age) correlated to cost.METHODS: Direct medical costs (diagnostic imaging and clinical laboratory exams, overheads/bed cost, pharmaceuticals, ringers and other non-durables and inpatient rehabilitation) per patient were calculated from the providers' (hospitals') perspective. Resource use data derived from the "SUN4P" web-based registry and unit costs were retrieved from publi...
Source: Studies in Health Technology and Informatics - Category: Information Technology Authors: Source Type: research
CONCLUSIONS: Health policy planners and decision-makers must take into consideration the results of such self-reported measures to establish innovative techniques to accomplish goals such as staff-specialization, continuous training and applying formal frameworks for efficient cooperation amongst different disciplines.PMID:35062174 | DOI:10.3233/SHTI210941
Source: Studies in Health Technology and Informatics - Category: Information Technology Authors: Source Type: research
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