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https://www.readbyqxmd.com/read/29140761/limb-segment-load-inhibits-the-recovery-of-soleus-h-reflex-after-segmental-vibration-in-humans
#1
Shih-Chiao Tseng, Richard K Shields
We investigated the effects of vertical vibration and compressive load on soleus H-reflex amplitude and postactivation depression. We hypothesized that, in the presence of a compressive load, limb vibration induces a longer suppression of soleus H-reflex. Eleven healthy adults received vibratory stimulation at a fixed frequency (30 Hz) over two loading conditions (0% and 50% of individual's body weight). H-reflex amplitude was depressed ∼88% in both conditions during vibration. Cyclic application of compression after cessation of the vibration caused a persistent reduction in H-reflex excitability and postactivation depression for > 2...
November 15, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/29140325/six-pack-off-axis-holography
#2
Moran Rubin, Gili Dardikman, Simcha K Mirsky, Nir A Turko, Natan T Shaked
We present a new holographic concept, named six-pack holography (6PH), in which we compress six off-axis holograms into a single multiplexed off-axis hologram without loss of magnification or resolution. The multiplexed hologram contains straight off-axis fringes with six different orientations, and can be generated optically or digitally. We show that since the six different complex wavefronts do not overlap in the spatial frequency domain, they can be fully reconstructed. 6PH allows more than 50% improvement in the spatial bandwidth consumption when compared to the best multiplexing method proposed so far...
November 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29137904/implications-of-iodinated-contrast-media-extravasation-in-the-emergency-department
#3
Jonathan D Sonis, Ravi V Gottumukkala, McKinley Glover, Brian J Yun, Benjamin A White, Mannudeep K Kalra, Alexi Otrakji, Ali S Raja, Anand M Prabhakar
PURPOSE: To characterize the management, outcomes, and emergency department (ED) length of stay (LOS) following iodinated contrast media extravasation events in the ED. METHODS: All ED patients who developed iodinated contrast media extravasation following contrast-enhanced CT (CECT) from October 2007-December 2016 were retrospectively identified. Medical records were reviewed and management, complications, frequency of surgical consultation, and ED LOS were quantified using descriptive statistics...
November 7, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29137737/acoustic-cavitation-in-1-butyl-3-methylimidazolium-bis-triflluoromethyl-sulfonyl-imide-based-ionic-liquid
#4
Slimane Merouani, Oualid Hamdaoui, Boumediene Haddad
In this work, a comparison between the temperatures/pressures within acoustic cavitation bubble in an imidazolium-based room-temperature ionic liquid (RTIL), 1-butyl-3-methylimidazolium bis(triflluoromethyl-sulfonyl)imide ([BMIM][NTf2]), and in water has been made for a wide range of cavitation parameters including frequency (140-1000kHz), acoustic intensity (0.5-1Wcm(-2)), liquid temperature (20-50°C) and external static pressure (0.7-1.5atm). The used cavitation model takes into account the liquid compressibility as well as the surface tension and the viscosity of the medium...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29135450/influence-of-acquisition-frame-rate-and-video-compression-techniques-on-pulse-rate-variability-estimation-from-vppg-signal
#5
Luca Cerina, Luca Iozzia, Luca Mainardi
In this paper, common time- and frequency-domain variability indexes obtained by pulse rate variability (PRV) series extracted from video-photoplethysmographic signal (vPPG) were compared with heart rate variability (HRV) parameters calculated from synchronized ECG signals. The dual focus of this study was to analyze the effect of different video acquisition frame-rates starting from 60 frames-per-second (fps) down to 7.5 fps and different video compression techniques using both lossless and lossy codecs on PRV parameters estimation...
November 14, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29134090/assessment-of-dynamic-material-properties-of-intact-rocks-using-seismic-wave-attenuation-an-experimental-study
#6
W A M Wanniarachchi, P G Ranjith, M S A Perera, T D Rathnaweera, Q Lyu, B Mahanta
The mechanical properties of any substance are essential facts to understand its behaviour and make the maximum use of the particular substance. Rocks are indeed an important substance, as they are of significant use in the energy industry, specifically for fossil fuels and geothermal energy. Attenuation of seismic waves is a non-destructive technique to investigate mechanical properties of reservoir rocks under different conditions. The attenuation characteristics of five different rock types, siltstone, shale, Australian sandstone, Indian sandstone and granite, were investigated in the laboratory using ultrasonic and acoustic emission instruments in a frequency range of 0...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29132029/reconstruction-of-atomic-force-microscopy-image-using-compressed-sensing
#7
Guoqiang Han, Bo Lin, Yuling Lin
Atomic Force Microscopy (AFM) is one of the most popular and advanced tools for ultra high-resolution imaging and nanomanipulation of nano-scale matter. But AFM imaging typically takes a long time. High-speed and high-precision AFM measurement has attracted wide attention in recent several years. In traditional AFM, simple reduction in the number of measurement points may lose essential sample topography information. To resolve such problems, an AFM image reconstruction method based on Compressed Sensing (CS) theory is applied to reduce image acquisition time without cutting down the image quality...
November 10, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/29131030/n-cadherin-mediated-activation-of-pi3k-akt-gsk-3%C3%AE-signaling-attenuates-nucleus-pulposus-cell-apoptosis-under-high-magnitude-compression
#8
Pei Li, Zherui Liang, Gang Hou, Lei Song, Ruijie Zhang, Yibo Gan, Chengmin Zhang, Yichun Xu, Qiang Zhou
BACKGROUND/AIMS: Mechanical overloading-induced nucleus pulposus (NP) apoptosis plays an important role in the pathogenesis of intervertebral disc degeneration. N-cadherin (N-CDH)-mediated signaling preserves normal NP cell phenotype. This study aims to investigate the effects of N-CDH on NP cell apoptosis under high-magnitude compression and the underlying mechanism behind this process. METHODS: Rat NP cells seeded on scaffold were perfusion-cultured using a self-developed perfusion bioreactor for 5 days and experienced different magnitudes (2% and 20% compressive deformation, respectively) of compression at a frequency of 1...
November 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29130683/triplet-ground-state-bridged-photochemical-process-understanding-the-photoinduced-chiral-inversion-at-the-metal-center-of-ru-phen-2-l-ser-and-its-bipy-analogues
#9
Lixia Feng, Yuekui Wang, Jie Jia
One of the main concerns in the photochemistry and photophysics of ruthenium complexes is the de-excitation of the triplet metal centered ligand-field state (3)MC. To understand the mechanism by which the (3)MC states in some reversible photochemical reactions could avoid the fate of fast decay and ligand dissociations, the photoinduced chiral inversion at the metal center of the complexes [Ru(diimine)2(l-ser)](+) (diimine = 1,10-phenanthroline or 2,2'-bipyridine, l-ser = l-serine) has been analyzed at the first principle level of theory...
November 13, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29123877/performance-review-of-regional-emergency-medical-service-pre-arrival-cardiopulmonary-resuscitation-with-or-without-dispatcher-instruction-a-population-based-observational-study
#10
Hidetada Fukushima, Yasuyuki Kawai, Hideki Asai, Tadahiko Seki, Kazunobu Norimoto, Yasuyuki Urisono, Kazuo Okuchi
Background: To investigate variations in emergency medical service (EMS) pre-arrival cardiopulmonary resuscitation (CPR), including both bystander CPR without dispatch assistance and dispatch-assisted CPR (DACPR). Methods: We carried out an observational study by implementing EMS pre-arrival CPR reports in three fire agencies. We included adult, non-traumatic, and non-EMS witnessed out-of-hospital cardiac arrests. This reporting system comprised the dispatch instruction process and bystander CPR quality based on evaluations by EMS crews who arrived on the scene...
July 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29121162/the-effect-of-adaptive-nonlinear-frequency-compression-on-phoneme-perception
#11
Danielle Glista, Marianne Hawkins, Andrea Bohnert, Julia Rehmann, Jace Wolfe, Susan Scollie
Purpose: This study implemented a fitting method, developed for use with frequency lowering hearing aids, across multiple testing sites, participants, and hearing aid conditions to evaluate speech perception with a novel type of frequency lowering. Method: A total of 8 participants, including children and young adults, participated in real-world hearing aid trials. A blinded crossover design, including posttrial withdrawal testing, was used to assess aided phoneme perception...
November 9, 2017: American Journal of Audiology
https://www.readbyqxmd.com/read/29119963/-what-physiotherapeutic-method-for-the-treatment-of-post-mastectomy-lymphedema-is-the-most-effective
#12
T I Grushina
We have undertaken the search for the publications of interest in the following databases: Scopus, Web of Science, MedLine, The Cochrane Library, CyberLeninka, and Russian science citation index. In addition, we evaluated the effectiveness of the physical agents and procedures having different mechanisms of action of the known factors responsible for the development of post-mastectomy lymphedema. Such agents and procedures include self-massage, manual lymphatic drainage, therapeutic physical exercises, compression bandaging, wearing elastic compression garments, Kinesio Tex taping, pneumatic compression, ultrasonic, electrostatic, extracorporeal shock wave therapy, electrical muscle stimulation, microcurrent and low-intensity laser therapy...
2017: Voprosy Kurortologii, Fizioterapii, i Lechebnoĭ Fizicheskoĭ Kultury
https://www.readbyqxmd.com/read/29116410/botulinum-toxin-therapy-in-patients-with-oral-anticoagulation-is-it-safe
#13
Christoph Schrader, Markus Ebke, Fereshte Adib Saberi, Dirk Dressler
When used therapeutically, botulinum toxin (BT) has to be injected into its target tissues. All manufacturers warn not to do so in patients with oral anticoagulation to avoid haematoma. We wanted to study the haematoma frequency (HF) in patients with anticoagulation receiving BT therapy. 32 patients (16 females, 16 males, age 69.3 ± 10.0 years) with blepharospasm (n = 6), hemifacial spasm (n = 8), post-stroke spasticity (n = 16), and cervical dystonia (n = 2) received BT therapy (needle size 27G, post-injection tissue compression) whilst on anticoagulation (anticoagulation group, AG)...
November 7, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29115920/genome-wide-association-mapping-of-resistance-to-a-brazilian-isolate-of-sclerotinia-sclerotiorum-in-soybean-genotypes-mostly-from-brazil
#14
Wei Wei, Ana Carolina Oliveira Mesquita, Adriana de A Figueiró, Xing Wu, Shilpa Manjunatha, Daniel P Wickland, Matthew E Hudson, Fernando C Juliatti, Steven J Clough
BACKGROUND: Sclerotinia Stem Rot (SSR), caused by the fungal pathogen Sclerotinia sclerotiorum, is ubiquitous in cooler climates where soybean crops are grown. Breeding for resistance to SSR remains challenging in crops like soybean, where no single gene provides strong resistance, but instead, multiple genes work together to provide partial resistance. In this study, a genome-wide association study (GWAS) was performed to dissect the complex genetic architecture of soybean quantitative resistance to SSR and to provide effective molecular markers that could be used in breeding programs...
November 7, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29112423/enabling-simultaneous-extreme-ultra-low-k-in-stiff-resilient-and-thermally-stable-nano-architected-materials
#15
Max L Lifson, Min-Woo Kim, Julia R Greer, Bong-Joong Kim
Low dielectric constant (low-k) materials have gained increasing popularity because of their critical role in developing faster, smaller, and higher performance devices. Their practical use has been limited by the strong coupling among mechanical, thermal, and electrical properties of materials and their dielectric constant; a low-k is usually attained by materials that are very porous, which results in high compliance, that is, silica aerogels; high dielectric loss, that is, porous polycrystalline alumina; and poor thermal stability, that is, Sr-based metal-organic frameworks...
November 9, 2017: Nano Letters
https://www.readbyqxmd.com/read/29109384/an-adaptive-transmitting-scheme-for-interrupted-sampling-repeater-jamming-suppression
#16
Chao Zhou, Feifeng Liu, Quanhua Liu
The interrupted sampling repeater jamming (ISRJ) based on a digital radio frequency memory (DRFM) device is a new type of coherent jamming. This kind of jamming usually occurs as main-lobe jamming and has the advantages of low power requirements and easy parameter adjustment, posing a serious threat to the modern radar systems. In order to suppress the ISRJ, this paper proposes an adaptive transmitting scheme based on a phase-coded signal. The scheme firstly performs jamming perception to estimate the jamming parameters, then, on this basis, optimizes the waveform with genetic algorithm...
October 29, 2017: Sensors
https://www.readbyqxmd.com/read/29104671/effect-of-pneumatic-compression-therapy-on-lymph-movement-in-lymphedema-affected-extremities-as-assessed-by-near-infrared-fluorescence-lymphatic-imaging
#17
Melissa B Aldrich, Deborah Gross, John Rodney Morrow, Caroline E Fife, John C Rasmussen
Previous studies have shown cost effectiveness and quality-of-life benefit of pneumatic compression therapy (PCT) for lymphedema. Insurers, such as the Centers for Medicare/Medicaid (CMS), however, desire visual proof that PCT moves lymph. Near-infrared fluorescence lymphatic imaging (NIRFLI) was used to visualize lymphatic anatomy and function in four subjects with primary and cancer treatment-related lymphedema (LE) of the lower extremities before, during, and after pneumatic compression therapy (PCT). Optically transparent and windowed PCT garments allowed visualization of lymph movement during single, one-hour PCT treatment sessions...
March 2017: Journal of Innovative Optical Health Sciences
https://www.readbyqxmd.com/read/29104135/nonlocal-strain-gradient-beam-model-for-postbuckling-and-associated-vibrational-response-of-lipid-supramolecular-protein-micro-nano-tubules
#18
S Sahmani, M M Aghdam
As a supramolecular construction, lipid protein micro/nano-tubules can be utilized in a variety of sustained biological delivery system. The high slenderness ratio of lipid tubules makes their hierarchical assembly into a desired architecture difficult. Therefore, an accurate prediction of mechanical behavior of lipid tubular is essential. The objective of this study is to capture size dependency in the postbuckling and vibrational response of the postbuckled lipid micro/nano-tubules more comprehensively. To this purpose, the nonlocal strain gradient elasticity theory is incorporated to the third-order shear deformation beam theory to develop an unconventional beam model...
November 8, 2017: Mathematical Biosciences
https://www.readbyqxmd.com/read/29096598/cost-effectiveness-analysis-of-sealing-hemostat-patches-vs-standard-of-care-in-cardiac-surgery
#19
Shelly Ikeme, Luca Weltert, Kevin M Lewis, Gerhard Bothma, Daniela Cianciulli, Nicole Pay, Josh Epstein, Erik Kuntze
BACKGROUND: A recent randomized controlled trial showed that patients undergoing ascending aorta surgery treated with HEMOPATCH to control bleeding had a significantly better hemostasis success rate than with dry or wet gauze compression or similar standard of care (SOC). OBJECTIVE: To compare the cost effectiveness using two different agents for hemostasis (HEMOPATCH versus dry or wet gauze compression or similar SOC) in cardiac surgery from the European hospital perspective...
November 3, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/29092611/modeling-signal-propagation-in-the-human-cochlea
#20
Stephen T Neely, Daniel M Rasetshwane
The level-dependent component of the latency of human auditory brainstem responses (ABR) to tonebursts decreases by about 38% for every 20-dB increase in stimulus level over a wide range of both frequency and level [Neely, Norton, Gorga, and Jesteadt (1998). J. Acoust. Soc. Am. 31, 87-97]. This level-dependence has now been simulated in an active, nonlinear, transmission-line model of cochlear mechanics combined with an adaptation stage. The micromechanics in this model are similar to previous models except that a dual role is proposed for the tectorial membrane (TM): (1) passive sharpening the tuning of sensory-cell inputs (relative to basilar-membrane vibrations) and (2) providing an optimal phase shift (relative to basilar-membrane vibrations) of outer-hair-cell feedback forces, so that amplification is restricted to a limited range of frequencies...
October 2017: Journal of the Acoustical Society of America
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