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https://www.readbyqxmd.com/read/28094239/performance-variation-due-to-stiffness-in-a-tuna-inspired-flexible-foil-model
#1
Mariel-Luisa N Rosic, Patrick J M Thornycroft, Kara L Feilich, Kelsey N Lucas, George V Lauder
Tuna are fast, economical swimmers in part due to their stiff, high aspect ratio caudal fins and streamlined bodies. Previous studies using passive caudal fin models have suggested that while high aspect ratio tail shapes such as a tuna's generally perform well, tail performance cannot be determined from shape alone. In this study, we analyzed the swimming performance of tuna-tail-shaped hydrofoils of a wide range of stiffnesses, heave amplitudes, and frequencies to determine how stiffness and kinematics affect multiple swimming performance parameters for a single foil shape...
January 17, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28079564/an-anesthesiologist-s-perspective-on-the-history-of-basic-airway-management-the-artisanal-anesthetic-era-1846-to-1904
#2
Adrian A Matioc
This second installment of the history of basic airway management covers the early-artisanal-years of anesthesia from 1846 to 1904. Anesthesia was invented and practiced as a supporting specialty in the context of great surgical and medical advances. The current-day anesthesia provider tends to equate the history of airway management with the history of intubation, but for the first 58 yr after the introduction of ether anesthesia, airway management was provided by basic airway techniques with or without the use of a face mask...
January 12, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28076293/electromyographic-classification-of-effort-in-muscle-strength-assessment
#3
Karan Veer, Tanu Sharma
Dual-channel evaluation of surface electromyogram (SEMG) signals acquired from amputee subjects using computational techniques for classification of arm motions is presented in this study. SEMG signals were classified by the neural network (NN) and interpretation was done using statistical techniques to extract the effectiveness of the recorded signals. From the results, it was observed that there exists a calculative difference in amplitude gain across different motions and that SEMG signals have great potential to classify arm motions...
January 11, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28070278/entanglement-is-a-costly-life-history-stage-in-large-whales
#4
Julie van der Hoop, Peter Corkeron, Michael Moore
Individuals store energy to balance deficits in natural cycles; however, unnatural events can also lead to unbalanced energy budgets. Entanglement in fishing gear is one example of an unnatural but relatively common circumstance that imposes energetic demands of a similar order of magnitude and duration of life-history events such as migration and pregnancy in large whales. We present two complementary bioenergetic approaches to estimate the energy associated with entanglement in North Atlantic right whales, and compare these estimates to the natural energetic life history of individual whales...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28070268/a-systematic-review-of-thrust-manipulation-for-non-surgical-shoulder-conditions
#5
REVIEW
Amy L Minkalis, Robert D Vining, Cynthia R Long, Cheryl Hawk, Katie de Luca
PURPOSE: Although many conservative management options are available for patients with non-surgical shoulder conditions, there is little evidence of their effectiveness. This review investigated one manual therapy approach, thrust manipulation, as a treatment option. METHODS: A systematic search was conducted of the electronic databases from inception to March 2016: PubMed, PEDro, ICL, CINAHL, and AMED. Two independent reviewers conducted the screening process to determine article eligibility...
2017: Chiropractic & Manual Therapies
https://www.readbyqxmd.com/read/28070237/to-ventricular-assist-devices-or-not-when-is-implantation-of-a-ventricular-assist-device-appropriate-in-advanced-ambulatory-heart-failure
#6
EDITORIAL
Emily Cerier, Brent C Lampert, Arman Kilic, Asia McDavid, Salil V Deo, Ahmet Kilic
Advanced heart failure has been traditionally treated via either heart transplantation, continuous inotropes, consideration for hospice and more recently via left ventricular assist devices (LVAD). Heart transplantation has been limited by organ availability and the futility of other options has thrust LVAD therapy into the mainstream of therapy for end stage heart failure. Improvements in technology and survival combined with improvements in the quality of life have made LVADs a viable option for many patients suffering from heart failure...
December 26, 2016: World Journal of Cardiology
https://www.readbyqxmd.com/read/28069513/structure-and-mechanical-implications-of-the-pectoral-fin-skeleton-in-the-longnose-skate-chondrichthyes-batoidea
#7
Wei Huang, Watcharapong Hongjamrassilp, Jae-Young Jung, Philip A Hastings, Vlado A Lubarda, Joanna McKittrick
Animal propulsion systems are believed to show high energy and mechanical efficiency in assisting movement compared to artificial designs. As an example, batoid fishes have very light cartilaginous skeletons that facilitate their elegant swimming via enlarged wing-like pectoral fins. The aim of this work is to illustrate the hierarchical structure of the pectoral fin of a representative batoid, the Longnose Skate (Raja rhina), and explain the mechanical implications of its structural design. At the macro level, the pectoral fins are comprised of radially oriented fin rays, formed by staggered mineralized skeletal elements stacked end-to-end...
January 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28059781/wing-kinematics-measurement-and-aerodynamics-of-a-dragonfly-in-turning-flight
#8
Chengyu Li, Haibo Dong
This study integrates high-speed photogrammetry, three-dimensional surface reconstruction, and computational fluid dynamics to explore a dragonfly (Erythemis Simplicicollis) in free flight. Asymmetric wing kinematics and the associated aerodynamic characteristics of a turning dragonfly are analyzed in detail. Quantitative measurements of wing kinematics show that compared to the outer wings, the inner wings sweep more slowly with a higher angle of attack during the downstroke, whereas they flap faster with a lower angle of attack during the upstroke...
January 6, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28059779/effect-of-leg-compliance-in-multi-directional-jumping-of-the-flea-inspired-mechanism
#9
Gwang-Pil Jung, Hong-Cheol Choi, Kyu-Jin Cho
Inspired by the relationship between leg compliance and jumping performance in the false stick insect, this paper describes how variations in leg compliance and jumping direction affect the performance of a flea-inspired jumping mechanism. The amount of energy lost during jumping was determined by examining the ratio of kinetic energy to input energy (also called conversion efficiency). Leg compliance is modeled based on the compliant mechanics to determine energy transfer during jumping and determined the optimum degree of leg compliance for maximizing performance...
January 6, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28057843/diphenhydramine-for-acute-extrapyramidal-symptoms-after-propofol-administration
#10
James Sherer, Tomas Salazar, Kevin B Schesing, Shannon McPartland, Jeffrey Kornitzer
Extrapyramidal symptoms are an uncommon but well-recognized side effect after the administration of general anesthesia in patients without a significant neurologic history. Several case reports implicate propofol as the likely causative agent producing these symptoms, which include ballismus, dystonia, choreoathetosis, and opisthotonus. Currently, there is no clear consensus on first-line treatment of these symptoms. In each of the published cases, anticholinergic medications and benzodiazepines were central to initial management, although the speed and extent of symptom resolution were variable...
January 5, 2017: Pediatrics
https://www.readbyqxmd.com/read/28056670/electromyographic-comparison-of-conventional-machine-strength-training-versus-bodyweight-exercises-in-patients-with-chronic-stroke
#11
Jonas Vinstrup, Joaquin Calatayud, Markus D Jakobsen, Emil Sundstrup, Kenneth Jay, Mikkel Brandt, Peter Zeeman, Jørgen R Jørgensen, Lars L Andersen
OBJECTIVE: To investigate whether bodyweight exercises can induce comparable levels of muscle activity as conventional machine exercises in chronic stroke patients. METHODS: Eighteen patients performed three repetitions of bilateral- and unilateral machine leg press and the bodyweight exercises chair rise and hip thrust. Surface electromyography (EMG) was recorded from 10 lower extremity muscles and normalized to maximal EMG (nEMG) of the non-paretic leg. RESULTS: For the paretic leg, the bodyweight exercises showed comparable levels of nEMG in 6 out of 10 muscles compared with the bilateral leg press...
January 6, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28053011/dismantling-the-silence-lgbtq-aging-emerging-from-the-margins
#12
Karen I Fredriksen-Goldsen
Historical, environmental, and cultural contexts intersect with aging, sexuality, and gender across communities and generations. My scholarship investigates health and well-being over the life course across marginalized communities, including LGBTQ (lesbian, gay, bisexual, transgender, and queer) midlife and older adults, native communities experiencing cardiovascular risk, and families in China living with HIV, in order to balance the realities of unique lives in contemporary society. By probing the intersection of age, sexuality, and gender, my analysis is informed by both personal and professional experiences...
January 3, 2017: Gerontologist
https://www.readbyqxmd.com/read/28031614/temporal-trends-in-pharmacology-publications-by-pharmacy-institutes-a-deeper-dig
#13
Parloop Amit Bhatt, Zarana Patel
OBJECTIVE: Publications in Indian Journal of Pharmacology (IJP) are the face of contemporary pharmacology practices followed in health-care profession - a knowledge-based profession. It depicts trends in terms of quantity (proportions), quality, type (preclinical/clinical), thrust areas, etc., of pharmacology followed by biomedical community professions both nationally and internationally. This article aims to establish temporal trends in pharmacology research by pharmacy institutes in light of its publications to IJP from 2010 to 2015...
October 2016: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/27997969/studying-the-microbiome-omics-made-accessible
#14
Paul W O'Toole, Burkhardt Flemer
The term microbiome refers to the collection of microbes or microbial genes in a specified location or clinical sample. Identifying micro-organisms has historically relied upon bacteriological culture, which is time consuming and difficult to effectively implement. The recent adaptation of culture-independent techniques for profiling microbial communities, allied with next-generation massively parallel DNA sequencing, allows clinician scientists to determine the entire microbial content of a specimen to a forensic level of detail within 48 hours...
September 2016: Seminars in Liver Disease
https://www.readbyqxmd.com/read/27987514/-effects-of-breast-feeding-duration-bottle-feeding-duration-and-oral-habits-on-the-occlusal-characteristics-of-primary-dentition
#15
X X Chen, B Xia, L H Ge, J W Yuan
OBJECTIVE: To assess the effects of breast-feeding duration, bottle-feeding duration and oral habits on the occlusal characteristics of primary dentition in 3-6-year-old children in Beijing. METHODS: This cross sectional study was conducted via an examination of the occlusal characteristics of 734 children combined with a questionnaire completed by their parents/guardians. The examination was performed by a single, previously calibrated examiner and the following variables were evaluated: presence or absence of deep overbite, open bite, anterior cross bite, posterior cross bite, deep overjet, terminal plane relationship of the second primary molar, primary canine relationship, crowding and spacing...
December 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/27974534/how-the-bending-kinematics-of-swimming-lampreys-build-negative-pressure-fields-for-suction-thrust
#16
Brad J Gemmell, Stephanie M Fogerson, John H Costello, Jennifer R Morgan, John O Dabiri, Sean P Colin
Swimming animals commonly bend their bodies to generate thrust. For undulating animals such as eels and lampreys, their bodies bend in the form of waves that travel from head to tail. These kinematics accelerate the flow of adjacent fluids, which alters the pressure field in a manner that generates thrust. We used a comparative approach to evaluate the cause-and-effect relationships in this process by quantifying the hydrodynamic effects of body kinematics at the body-fluid interface of the lamprey, Petromyzon marinus, during steady-state swimming...
December 15, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27973693/reliability-and-validity-of-a-tool-to-measure-the-severity-of-tongue-thrust-in-children-the-tongue-thrust-rating-scale
#17
Selen Serel Arslan, Numan Demir, Aynur Ayşe Karaduman
OBJECTIVE(S): This study aimed to develop a scale called Tongue Thrust Rating Scale (TTRS), which categorized tongue thrust in children in terms of its severity during swallowing, and to investigate its validity and reliability. METHODS: The study describes the developmental phase of the TTRS and presented its content and criterion-based validity and inter-observer and intra-observer reliability. For content validation, seven experts assessed the steps in the scale over two Delphi rounds...
December 14, 2016: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/27968991/wsa206-a-paralog-of-duplicated-mpf2-like-mads-box-family-is-recruited-in-fertility-function-in-withania
#18
Muhammad Ramzan Khan, Humera Ihsan, Ghulam Muhammad Ali
Best known for their implication in calyx inflation, MPF2-like genes pertinent to the STMADS11 clade of the MADS-box family exert their functions in leaf development, flowering time, inflorescence architecture and floral reversion to just name but a few. However, our knowledge about their involvement in fertility function remained obscure. Therefore the major thrust of this study was to probe the recruitment of WSA206 (MPF2-like) protein in fertility function. The WSA206 functions were revealed by knocking down and overexpressing this protein in Withania somnifera...
December 2016: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/27966795/the-so-called-death-drive-an-indispensable-force-for-any-subjective-life
#19
Bernard Penot
The psychoanalytic movement has difficulty in overcoming the malaise bequeathed by what Freud wanted to call the 'death drive'. This term remains doubly problematic: first because the indispensable antagonist of Eros-binding cannot be reduced to a particular drive; and secondly because this Anteros plays a vital role in subjectivization. The Freudian idea of the 'death drive' has in addition the drawback of confusing dissociative thrust (unbinding) with the aggressive component of libidinal cathexis. Now it is precisely the lack of articulation between them that leads to deconstructing it...
December 14, 2016: International Journal of Psycho-analysis
https://www.readbyqxmd.com/read/27965272/batoid-fish-locomotion-effects-of-speed-on-pectoral-fin-deformation-in-the-little-skate-leucoraja-erinacea
#20
Valentina Di Santo, Erin L Blevins, George V Lauder
Most batoid fishes have a unique swimming mode in which thrust is generated by either oscillating or undulating expanded pectoral fins that form a disc. Only one previous study of the freshwater stingray has quantified three-dimensional motions of the wing, and no comparable data are available for marine batoid species that may differ considerably in their mode of locomotion. Here we investigate three-dimensional kinematics of the pectoral wing of the little skate, Leucoraja erinacea, swimming steadily at two speeds (1 and 2 body lengths per second, BL×s(-1))...
December 13, 2016: Journal of Experimental Biology
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