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Journal articles on the topic 'HFTC'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Freedman, J. Daniel, Rostislav Novak, Sharon Bratman Morag, Emily Avitan-Hersh, and David Nikomarov. "Bone Involvement in Hyperphosphatemic Familial Tumoral Calcinosis: A New Phenotypic Presentation." Rambam Maimonides Medical Journal 12, no. 3 (2012): e0024. http://dx.doi.org/10.5041/rmmj.10445.

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Mutations in FGF23, KL, and GALNT3 have been identified as the cause for the development of hyperphosphatemic familial tumoral calcinosis (HFTC). Patients with HFTC typically present in childhood or adolescence with periarticular soft tissue deposits that eventually progress to disrupt normal joint articulation. Mutations in the GALNT3 gene were shown to account for the hyperphosphatemic state in both HFTC and hyperostosis-hyperphosphatemia syndrome (HHS), the latter characterized by bone involvement. We present the case of a patient of a Druze ethnic origin with known HFTC that presented to o

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Augustson, Erik, Michael M. Engelgau, Shu Zhang, et al. "Text to Quit China: An mHealth Smoking Cessation Trial." American Journal of Health Promotion 31, no. 3 (2016): 217–25. http://dx.doi.org/10.4278/ajhp.140812-quan-399.

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Purpose. To assess the feasibility, acceptability, and efficacy of a text message–based smoking cessation intervention in China. Design. Study design was a randomized control trial with a 6-month follow-up assessment of smoking status. Setting. Zhejiang, Heilongjiang, and Shaanxi provinces in China provided the study setting. Subjects. A total of 8000 adult smokers in China who used Nokia Life Tools and participated in phase 2 (smoking education via text message) of the study were included. Intervention. The high-frequency text contact (HFTC) group received one to three messages daily containi

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Carrara, Guilherme M. P., Gabriela B. Silva, Lucas S. Faria, et al. "IgY antibody and human neurocysticercosis: a novel approach on immunodiagnosis using Taenia crassiceps hydrophobic antigens." Parasitology 147, no. 2 (2019): 240–47. http://dx.doi.org/10.1017/s0031182019001446.

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AbstractHuman neurocysticercosis (NCC) is a worldwide neglected disease caused by Taenia solium metacestode and responsible for various complications and neurological disorders. This study aimed to evaluate the use of specific immunoglobulin Y (IgY) produced by laying hens immunized with a hydrophobic fraction of Taenia crassiceps metacestodes (hFTc) in NCC diagnosis. Egg yolk IgY antibodies were fractionated, purified and characterized. Enzyme-linked immunosorbent assay (ELISA) was carried out to evaluate the production kinetics and avidity maturation of anti-hFTc IgY antibodies throughout th

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Tian, Jie, Ming Yu Luo, and Meng Yang Chen. "A New Type of Hexagonal Fault-Tolerant Clustering Algorithm." Applied Mechanics and Materials 543-547 (March 2014): 1728–33. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.1728.

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In view of the problem that present most clustering algorithms are given priority to save energy but ignoring fault tolerance, this paper puts forward a new kind of hexagonal fault-tolerant clustering algorithm (HFTC). By increasing the middle management node, which controls nodes rate of false positives and managements topology within the cluster, this algorithm completes nondestructive substitution between nodes. At the same time, the introduction of backup nodes, it also improves the networks fault tolerance. The simulation experiments show that HFTC can guarantee a high fault tolerance in

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Peluso, Gabriella, E. Tian, Loreto Abusleme, Takashi Munemasa, Taro Mukaibo, and Kelly G. Ten Hagen. "Loss of the disease-associated glycosyltransferase Galnt3 alters Muc10 glycosylation and the composition of the oral microbiome." Journal of Biological Chemistry 295, no. 5 (2019): 1411–25. http://dx.doi.org/10.1074/jbc.ra119.009807.

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The importance of the microbiome in health and its disruption in disease is continuing to be elucidated. However, the multitude of host and environmental factors that influence the microbiome are still largely unknown. Here, we examined UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase 3 (Galnt3)-deficient mice, which serve as a model for the disease hyperphosphatemic familial tumoral calcinosis (HFTC). In HFTC, loss of GALNT3 activity in the bone is thought to lead to altered glycosylation of the phosphate-regulating hormone fibroblast growth factor 23 (FGF23), resulting in hyperphosph

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Vieira, Alexandre R., Moses Lee, Filippo Vairo, et al. "Root anomalies and dentin dysplasia in autosomal recessive hyperphosphatemic familial tumoral calcinosis (HFTC)." Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology 120, no. 6 (2015): e235-e239. http://dx.doi.org/10.1016/j.oooo.2015.05.006.

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Hammoud, Rola, Emanuela Pannia, Chih-Sheng Liao, et al. "Choline Supplementation Mitigates the Adverse Effects of a High Folic Acid Maternal Diet on Food Intake Regulation in the Offspring." Current Developments in Nutrition 4, Supplement_2 (2020): 1806. http://dx.doi.org/10.1093/cdn/nzaa067_033.

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Abstract Objectives Folic acid (FA) intake by many women in North America is exceeding recommendations. We have shown that high maternal FA induces methylation-dependent programming of energy regulation associated with an obesogenic phenotype in adult rat offspring. However, it is unclear if this is a direct effect of high FA or due to an imbalance between FA and other methyl-nutrients (i.e., choline) in the 1-carbon cycle. Unlike FA, choline intake by women is below recommendations and is absent from most prenatal supplements, potentially affecting fetal development. The objective of this stu

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8

Brogaard, Jonathan, and Corey Garriott. "High-Frequency Trading Competition." Journal of Financial and Quantitative Analysis 54, no. 4 (2018): 1469–97. http://dx.doi.org/10.1017/s0022109018001175.

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Theory on high-frequency traders (HFTs) predicts that market liquidity for a security decreases in the number of HFTs trading the security. We test this prediction by studying a new Canadian stock exchange, Alpha, that experienced the entry of 11 HFTs over 4 years. We find that bid–ask spreads on Alpha converge to those at the Toronto Stock Exchange as more HFTs trade on Alpha. Effective and realized spreads for non-HFTs improve as HFTs enter the market. To explain the contrast with theory, which models the HFT as a price competitor, we provide evidence more consistent with HFTs fitting a quan

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9

Frim, J., and M. B. Ducharme. "Heat flux transducer measurement error: a simplified view." Journal of Applied Physiology 74, no. 4 (1993): 2040–44. http://dx.doi.org/10.1152/jappl.1993.74.4.2040.

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Heat flux transducers (HFTs) provide a simple and direct measurement of body heat exchange. Regrettably, HFTs perturb the heat flux at the measurement site, resulting in underestimations of the true heat flux. Equations to correct the discrepancy are available, but most require high-precision temperature measurements above and/or below the transducer and/or deep within the body tissues. Because this is not always feasible, the equations are of limited practical benefit. A theoretical basis for the magnitude of the correction factor in relation to the thermal resistances of the materials both a

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Kuyk, T. "Telescopic Low Vision Aids with Motorized and Auto Focuses." Journal of Visual Impairment & Blindness 90, no. 4 (1996): 333–40. http://dx.doi.org/10.1177/0145482x9609000408.

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Prototypes of motorized-focus telescopes (MFTs) and of a 4X auto-focus telescope (AFT) were constructed, and 22 users of hand-focus telescopes (HFTs) were trained to use them for near-distance and intermediate-distance tasks. Despite the lack of differences in performance with the MFT, AFT, and HFT, the subjects’ ratings on 9 of 10 aspects of telescope performance were significantly higher for the AFT and MFT than for the HFT.

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11

Barros, Érico Luiz Damasceno, Shelon Cristina Souza Pinto, Alvaro Henrique Borges, et al. "Toothpaste Prevents Debonded Brackets on Erosive Enamel." Scientific World Journal 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/468582.

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This study evaluated the effect of high fluoride dentifrice on the bond strength of brackets after erosive challenge. Eighty-four enamel specimens were divided into seven groups(n=12): WN (distilled water/no acid challenge), W3C (distilled water/3 cycles of acid challenge), and W6C (distilled water/6 cycles of acid challenge) were not submitted to dentifrice treatment. Groups RF3C (regular fluoride dentifrice/3 cycles of acid challenge) and RF6C (regular fluoride dentifrice/6 cycles of acid challenge) were treated with dentifrices containing 1450 μg F−/g and HF3C (high fluoride dentifrice/3 cy

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Chakravarty, Sugato, Kiseop Lee, and Yang Xi. "Multivariate Hawkes process model of market participants behavior in the high frequency world." International Journal of Financial Engineering 08, no. 01 (2021): 2050054. http://dx.doi.org/10.1142/s2424786320500541.

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We propose a multivariate Hawkes process to model the interaction between the non-high frequency traders (NHFTs) behavior (Buy and sell) and high frequency traders (HFTs) behavior (Buy and sell). We apply our model to the intraday transaction data of the public sector banks stock in India, which is sampled from March 2012 to June 2012. We find that the mutually-exciting NHFT and HFT behaviors benefit the stocks, which have better average return above the average return of the public sector bank index. We further identify the granger causality relationship for mutually exciting dominating stock

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13

Ducharme, M. B., J. Frim, and P. Tikuisis. "Errors in heat flux measurements due to the thermal resistance of heat flux disks." Journal of Applied Physiology 69, no. 2 (1990): 776–84. http://dx.doi.org/10.1152/jappl.1990.69.2.776.

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Questions have been raised regarding the effect of the thermal resistance of heat flux transducers (HFTs) on the thermal flux from the skin. A model capable of simulating a large range of "tissue" insulation (variable-R model) was used to study the effect of the underlying tissue insulation on the relative error in heat flux due to the thermal resistance of the HFTs. The data show that the deviation from the true value of heat flux increases as the insulation of the underlying tissue decreases (r = 0.99, P less than 0.001). The underestimation of the heat flux through the skin measured by an H

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14

Piamonte, Dominic Paul T. "On the Merits of Using Multiple Indices in Evaluating Small Graphical Symbols." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 44, no. 37 (2000): 658–61. http://dx.doi.org/10.1177/154193120004403730.

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This paper summarizes an international study that aimed to evaluate candidate telecommunication graphical symbols (icons and pictograms) developed in the west across different cultural groups by means of tests producing multiple indices or parameters of performance. Prospective users from eastern (Asian) and western countries were used as subjects. Several tests were performed utilizing videophone symbols based on studies done by the Human Factors Technical Committee (HFTC) of the European Telecommunication Standards Institute (ETSI). The ETSI-recommended symbols for 7 videophone functions or

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Brigida, Matt, and William Pratt. "Trade Intensity and Liquidity." Market Microstructure and Liquidity 04, no. 01n02 (2018): 1950002. http://dx.doi.org/10.1142/s2382626619500023.

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This analysis investigates how liquidity is affected by periods of high trade intensity. Using an orderbook constructed directly from CME FIX/FAST messages and timestamped to the millisecond, we test whether the number of changes in the orderbook, the size of the bid–ask spread, and the number of trades in the few seconds before a trade have an effect on the book’s liquidity in the milliseconds after the trade. Since we calculate liquidity over a period of 100[Formula: see text]ms after a trade, we focus on liquidity provided by high-frequency traders (HFTs). We find evidence consistent with l

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Zhang, Quanhao, Rui Liu, Yuming Wang, Zhenjun Zhou, Bin Zhuang, and Xiaolei Li. "How flux feeding causes eruptions of solar magnetic flux ropes with the hyperbolic flux tube configuration." Astronomy & Astrophysics 647 (March 2021): A171. http://dx.doi.org/10.1051/0004-6361/202039944.

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Coronal magnetic flux ropes are generally considered to be the core structure of large-scale solar eruptions. Recent observations found that solar eruptions could be initiated by a sequence of flux feeding, during which chromospheric fibrils rise upward from below, and merge with a pre-existing prominence. Further theoretical study has confirmed that the flux feeding mechanism is efficient in causing the eruption of flux ropes that are wrapped by bald patch separatrix surfaces. But it is unclear how flux feeding influences coronal flux ropes that are wrapped by hyperbolic flux tubes (HFTs), an

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17

Park, Man-Young, Jong-Hoon Son, Sang-Woo Kang, and Shi-Woo Rhee. "Comparison of (hexafluoroacetylacetonate)Cu(vinyltrimethylsilane) and (hexafluoroacetylacetonate)Cu(allyltrimethylsilane) for metalorganic chemical vapor deposition of copper." Journal of Materials Research 14, no. 3 (1999): 975–79. http://dx.doi.org/10.1557/jmr.1999.0129.

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For the metalorganic chemical vapor deposition (MOCVD) of copper, (hfac)Cu(VTMS) (hfac = hexafluoroacetylacetonate, VTMS = vinyltrimethylsilane) and (hfac)Cu(ATMS) (ATMS = allyltrimethylsilane) were compared, and the effect of L ligand in (hfac)Cu–L was examined. It was found by 1H-NMR (nuclear magnetic resonance) that the thermal stability of (hfac)Cu(VTMS) was better than that of (hfac)Cu(ATMS) due to the relatively weak Cu–ATMS bond. From in situ Fourier transform infrared spectroscopy (FTIR) experiments, the formation of Cu(hfac)2, the product of disproportion reaction of Cu(hfac), was obs

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Mhammedi, Taoufik, Lionel Camberlein, Frédéric Polet, Bruno Bêche, and Etienne Gaviot. "Enthalpy-Sensing Microsystem Effective in Continuous Flow." Sensors 19, no. 3 (2019): 566. http://dx.doi.org/10.3390/s19030566.

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A new microsystem designed to detect and measure in real time the enthalpy of mixing of two fluid constituents is presented. A preliminary approach to quantify the enthalpy of dilution values or mixing is first discussed. Then, a coherent rationale leading to structure devices operating in real time is formulated, considering the straightforward assessment of heat-flux transducers (HFTs) capability. Basic thermodynamic observations regarding the analogy between thermal and electrical systems are highlighted prior consideration of practical examples involving mixing water and alcohols. Fundamen

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Koyauchi, Takafumi, Hideki Yasui, Noriyuki Enomoto, et al. "Pulse oximetric saturation to fraction of inspired oxygen (SpO2/FIO2) ratio 24 hours after high-flow nasal cannula (HFNC) initiation is a good predictor of HFNC therapy in patients with acute exacerbation of interstitial lung disease." Therapeutic Advances in Respiratory Disease 14 (January 2020): 175346662090632. http://dx.doi.org/10.1177/1753466620906327.

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Background: High-flow nasal cannula (HFNC) oxygen therapy provides effective respiratory management in patients with hypoxemic respiratory failure. However, the efficacy and tolerability of HFNC for patients with acute exacerbation of interstitial lung disease (AE-ILD) have not been established. This study was performed to assess the efficacy and tolerability of HFNC for patients with AE-ILD and identify the early predictors of the outcome of HFNC treatment. Methods: We retrospectively reviewed the records of patients with AE-ILD who underwent HFNC. Overall survival, the success rate of HFNC t

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Lethesh, Kallidanthiyil Chellappan, Sigurd Øien-Ødegaard, Kaushik Jayasayee, and Anne Fiksdahl. "Synthesis of magnesium complexes of ionic liquids with highly coordinating anions." Dalton Transactions 48, no. 3 (2019): 982–88. http://dx.doi.org/10.1039/c8dt04364g.

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Magnesium-complexes [Mg<sup>2+</sup>(hfac<sup>−</sup>)<sub>3</sub>][Cation<sup>+</sup>] were prepared from Mg(Tf<sub>2</sub>N)<sub>2</sub>and ILs; [C<sub>4</sub>mim][hfac], [C<sub>4</sub>Pyr][hfac], [C<sub>4</sub>Pip][hfac], [C<sub>6</sub>Morph][hfac], and [C<sub>4</sub>Pyrr][hfac]; complex-characterization by<sup>1</sup>H and<sup>13</sup>C NMR, and X-ray spectroscopy.

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FUYAMA, Moriaki, Masanobu HANAZONO, Mitsuru URA, and Haruhiko HONDA. "Formation and Wear Mode of HfC-(HfTi)C-TiC Triple Layered Film by Mediu Size CVD Apparatus." SHINKU 34, no. 4 (1991): 405–12. http://dx.doi.org/10.3131/jvsj.34.405.

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Delbove, Agathe, Ambroise Foubert, François Mateos, Tiphaine Guy, and Marie Gousseff. "High flow nasal cannula oxygenation in COVID-19 related acute respiratory distress syndrome: a safe way to avoid endotracheal intubation?" Therapeutic Advances in Respiratory Disease 15 (January 2021): 175346662110195. http://dx.doi.org/10.1177/17534666211019555.

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Backgrounds: High flow nasal cannula (HFNC) is an alternative therapy for acute respiratory distress syndrome (ARDS) due to coronavirus disease 2019 (COVID-19). This study aimed first to describe outcomes of patients suffering from COVID-19-related ARDS treated with HFNC; secondly to evaluate safety of HFNC (patients and healthcare workers) and compare patients according to respiratory outcome. Methods: A retrospective cohort was conducted in French general hospital intensive care unit (ICU). Patients were included if receiving HFNC for hypoxemia (saturation pulse oxygen (SpO2) <92% under o

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Kansal, Amit, Shekhar Dhanvijay, Andrew Li, et al. "Predictors and outcomes of high-flow nasal cannula failure following extubation: A multicentre observational study." Annals of the Academy of Medicine, Singapore 50, no. 6 (2021): 467–73. http://dx.doi.org/10.47102/annals-acadmedsg.2020564.

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Introduction: Despite adhering to criteria for extubation, up to 20% of intensive care patients require re-intubation, even with use of post-extubation high-flow nasal cannula (HFNC). This study aims to identify independent predictors and outcomes of extubation failure in patients who failed postextubation HFNC. Methods: We conducted a multicentre observational study involving 9 adult intensive care units (ICUs) across 5 public hospitals in Singapore. We included patients extubated to HFNC following spontaneous breathing trials. We compared patients who were successfully weaned off HFNC with t

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Storgaard, Line Hust, Hans-Ulrich Hockey, and Ulla Møller Weinreich. "Development in PaCO2 over 12 months in patients with COPD with persistent hypercapnic respiratory failure treated with high-flow nasal cannula—post-hoc analysis from a randomised controlled trial." BMJ Open Respiratory Research 7, no. 1 (2020): e000712. http://dx.doi.org/10.1136/bmjresp-2020-000712.

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IntroductionPersistent hypercapnic failure in chronic obstructive pulmonary disease (COPD) is associated with poor prognosis. Long-term home non-invasive ventilation is recommended for patients with PaCO2 >7.0 kPa. Domiciliary high-flow nasal cannula (HFNC) reduces PaCO2 in short-term studies. This post-hoc analysis examines the effect of HFNC on PaCO2 levels, exacerbations and admissions in patients with COPD with persistent hypercapnic and hypoxic failures.MethodsThe original trial included 74 long-term oxygen-treated patients (31 HFNC treated/43 controls) with persistent hypercapnic fail

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D’Alessandro, Michelle, Thuva Vanniyasingam, Ashaka Patel, et al. "6 Factors associated with treatment failure of high flow nasal cannula (HFNC) among children with bronchiolitis: a single centre retrospective study." Paediatrics & Child Health 25, Supplement_2 (2020): e2-e3. http://dx.doi.org/10.1093/pch/pxaa068.005.

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Abstract Background Bronchiolitis is the most common viral lower respiratory tract infection in children under two years of age and is the leading cause of hospital admission for children under the age of one year. Respiratory support for bronchiolitis with high flow nasal cannula (HFNC) is increasingly being used outside of critical care areas and in community hospitals. It is important to understand the patient factors associated with HFNC treatment failure in order to identify which patients are at higher risk for requiring escalation of respiratory support and transfer to a pediatric criti

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Kunkely, Horst, and Arnd Vogler. "Photodisproportionation of (1,5-Cyclooctadiene) copper(I) Hexafluoroacetylacetonate Induced by Metal-to-Ligand Charge Transfer Excitation." Zeitschrift für Naturforschung B 58, no. 7 (2003): 704–7. http://dx.doi.org/10.1515/znb-2003-0717.

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The complex CuI(COD)(hfac) with COD = 1,5- cyclooctadiene and hfac = hexafluoroacetyl-acetonate shows two long-wavelength absorptions at λmax = 308 and 241 nm which are assigned to hfac intraligand (IL) and CuI →COD metal-to-ligand charge transfer (MLCT) transitions, respectively. The photolysis of CuI(COD)(hfac) in hexane leads to the release of the olefin and the subsequent disproportionation of CuI(hfac) to elemental copper and CuII(hfac)2 with the quantum yields Φ = 10−3 at λirr =313 nm and Φ = 3×10−3 at λirr = 254 nm. It is suggested that the reactive excited state is of the MLCT type.

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Heijboer, Frank, Laurien Oswald, Sander Cretier, and Gert-Jan Braunstahl. "Pneumomediastinum in a patient with COVID-19 due to diffuse alveolar damage." BMJ Case Reports 14, no. 5 (2021): e242527. http://dx.doi.org/10.1136/bcr-2021-242527.

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A 74-year-old man with COVID-19 was admitted and experienced progressive dyspnoea while receiving supplemental oxygen via high-flow nasal cannula (HFNC). A CT of the thorax showed a pneumomediastinum. The HFNC was temporally interrupted, since it was uncertain whether the positive end-expiratory pressure of the HFNC could be the cause of the pneumomediastinum. After restart of the HFNC, there was no increase of symptoms. We suggest that the pneumomediastinum was the result of COVID-19-related alveolar damage, and not due to the use of HFNC. This observation is relevant since HFNC is often used

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Kamada, Yoshihiro, Shinichi Kiso, Yuichi Yoshida, et al. "Estrogen deficiency worsens steatohepatitis in mice fed high-fat and high-cholesterol diet." American Journal of Physiology-Gastrointestinal and Liver Physiology 301, no. 6 (2011): G1031—G1043. http://dx.doi.org/10.1152/ajpgi.00211.2011.

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Recent studies indicate an accelerated progression of nonalcoholic steatohepatitis (NASH) in postmenopausal women. Hypercholesterolemia, an important risk factor for NASH progression, is often observed after menopause. This study examined the effects of estrogen on NASH in ovariectomized (OVX) mice fed a high-fat and high-cholesterol (HFHC) diet. To investigate the effects of estrogen deficiency, OVX mice and sham-operated (SO) mice were fed normal chow or HFHC diet for 6 wk. Next, to investigate the effects of exogenous estrogen replenishment, OVX mice fed with HFHC diet were treated with imp

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Chang, Gordon Y., Cynthia A. Cox, and Thomas H. Shaffer. "Nasal Cannula, CPAP, and High-Flow Nasal Cannula: Effect of Flow on Temperature, Humidity, Pressure, and Resistance." Biomedical Instrumentation & Technology 45, no. 1 (2011): 69–74. http://dx.doi.org/10.2345/0899-8205-45.1.69.

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Abstract Background: Delivery of warm, humidified, supplemental oxygen via high-flow nasal cannula has several potential benefits; however, the high-flow range may not maintain humidification and temperature and in some cases may cause excessive expiratory pressure loading. Objective: To compare the effect of flow on temperature, humidity, pressure, and resistance in nasal cannula (NC), continuous positive airway pressure (CPAP), and high-flow nasal cannula (HFNC) in a clinical setting. Methods: The three delivery systems were tested in the nursery using each instrument's recommended specifica

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Andino, Ricardo, Gema Vega, Sandra Karina Pacheco, et al. "High-flow nasal oxygen reduces endotracheal intubation: a randomized clinical trial." Therapeutic Advances in Respiratory Disease 14 (January 2020): 175346662095645. http://dx.doi.org/10.1177/1753466620956459.

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Background: The benefits of high-flow nasal cannula (HFNC) as primary intervention in patients with acute hypoxemic respiratory failure (AHRF) are still a matter in debate. Our objective was to compare HFNC therapy versus conventional oxygen therapy (COT) in the prevention of endotracheal intubation in this group of patients. Methods: An open-label, controlled and single-centre clinical trial was conducted in patients with severe AHRF, defined by a PaO2/FIO2 ratio ⩽200, to compare HFNC with a control group (CG) treated by COT delivered through a face mask, with the need to perform intubation a

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Dosman, Cara F., Peter C. Zuberbuhler, Joan I. Tabk, and Richard L. Jones. "Effects of Positive End-Expiratory Pressure on Oscillated Volume during High-Frequency Chest Compression in Children with Cystic Fibrosis." Canadian Respiratory Journal 10, no. 2 (2003): 94–98. http://dx.doi.org/10.1155/2003/792917.

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OBJECTIVE: To investigate the effects of positive end-expiratory pressure (PEEP) on end-expiratory lung volume (EELV) and mean oscillated volume (Vosc) during high frequency chest compression (HFCC).DESIGN: A clinic-based prospective intervention study.SETTING: Pulmonary function laboratory, University of Alberta, Edmonton, Alberta.POPULATION: Nine children with cystic fibrosis with little or no obstructive airway disease who were selected from the outpatient Cystic Fibrosis and Pediatric Pulmonary Clinics at the University of Alberta Hospital, Edmonton, Alberta.METHODS: Each child received HF

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Lee, Young Seok, Sung Won Chang, Jae Kyeom Sim, Sua Kim, and Je Hyeong Kim. "An Integrated Model including the ROX Index to Predict the Success of High-Flow Nasal Cannula Use after Planned Extubation: A Retrospective Observational Cohort Study." Journal of Clinical Medicine 10, no. 16 (2021): 3513. http://dx.doi.org/10.3390/jcm10163513.

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High-flow nasal cannula (HFNC) therapy is commonly used to prevent reintubation after planned extubation. In clinical practice, there are no appropriate tools to evaluate whether HFNC therapy was successful or failed after planned extubation. In this retrospective observational study, we investigated whether the use of the ROX index was appropriate to differentiate between HFNC success and failure within 72 h after extubation and to develop an integrated model including the ROX index to improve the prediction of HFNC success in patients receiving HFNC therapy after planned extubation. Of 276 p

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Yao, Wenjin, Weiwei Sun, Ze Shi, Bingcheng Chen, Le Chen, and Jun Feng. "Blast-Resistant Performance of Hybrid Fiber-Reinforced Concrete (HFRC) Panels Subjected to Contact Detonation." Applied Sciences 10, no. 1 (2019): 241. http://dx.doi.org/10.3390/app10010241.

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This paper experimentally investigates the blast-resistant characteristics of hybrid fiber-reinforced concrete (HFRC) panels by contact detonation tests. The control specimen of plain concrete, polypropylene (PP), polyvinyl alcohol (PVA) and steel fiber-reinforced concrete were prepared and tested for characterization in contrast with PP-Steel HFRC and PVA-Steel HFRC. The sequent contact detonation tests were conducted with panel damage recorded and measured. Damaged HFRC panels were further comparatively analyzed whereby the blast-resistance performance was quantitively assessed via damage co

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Freese, Eric C., Nicholas H. Gist, Rachelle M. Acitelli, et al. "Acute and chronic effects of sprint interval exercise on postprandial lipemia in women at-risk for the metabolic syndrome." Journal of Applied Physiology 118, no. 7 (2015): 872–79. http://dx.doi.org/10.1152/japplphysiol.00380.2014.

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Individuals diagnosed with the metabolic syndrome (MetS) exhibit elevated postprandial lipemia (PPL). The aims of this investigation were to determine 1) if an acute bout of sprint interval training (SIT) attenuates PPL; and 2) if the attenuation of PPL following 6 wk of SIT is magnified compared with a single session of SIT prior to training in women at-risk for MetS ( n = 45; 30–65 yr). Women were randomized to SIT ( n = 22) or a nonexercise control ( n = 23; CON) for 6 wk. Postprandial responses to a high-fat meal challenge (HFMC) were assessed in the CON group before (B-HFMC) and after (Po

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Yuan, Zheng, Neil H. Dryden, Jagadese J. Vittal, and Richard J. Puddephatt. "A binuclear bis{bis(dimethylphosphino)methane}disilver(I) complex with weakly bonded hexafluoroacetylacetonato ligands." Canadian Journal of Chemistry 72, no. 7 (1994): 1605–9. http://dx.doi.org/10.1139/v94-200.

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The new complex [Ag2(hfac)2(μ-dmpm)2] (hfac = hexafluoroacetylacetonato, dmpm = Me2PCH2PMe2) has been prepared and characterized both spectroscopically and by an X-ray structure determination (orthorhombic, Pbca (No. 61), a = 9.960(2), b = 14.694(3), c = 22.548(3) Å, Z = 4, R = 0.0495, Rw = 0.0532). The data indicate that the hfac− ligands have mostly ionic character and it is suggested that this may be responsible for the low volatility of complexes [Ag(hfac)Ln] compared to [Cu(hfac)Ln]; these complexes are of interest as precursors for chemical vapour deposition of silver.

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Sanuki, Takuro, Gaku Mishima, Kensuke Kiriishi, et al. "Nitrous Oxide Inhalation Sedation Through a Nasal High-Flow System: The Possibility of a New Technique in Dental Sedation." Anesthesia Progress 64, no. 3 (2017): 175–77. http://dx.doi.org/10.2344/anpr-64-04-06.

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High-flow nasal cannula (HFNC) systems are increasingly used for patients with both acute and chronic respiratory failure because of the clinical effectiveness and patient comfort associated with their use. Recently, HFNC has been used not only as a respiratory support device, but also as a drug delivery system. HFNC is designed to administer heated and humidified inspiratory oxygen flows (100% relative humidity at 37°C). Therefore, HFNC can provide high flows (up to 60 L/min) without discomfort. Moreover, HFNC improves oxygenation by exerting physiologic effects such as (a) dead-space washout

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Pawlowski, Valeri, Andreas Strasser, and Arnd Vogler. "Synthesis, Electronic Spectra and Solvent-Induced Reversible Dissociation of Diphosphine(hexafluoroacetylacetonato)copper(I) Complexes." Zeitschrift für Naturforschung B 58, no. 10 (2003): 950–54. http://dx.doi.org/10.1515/znb-2003-1003.

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The complexes CuI(P-P)(hfac) with P-P = 1,2-bis(diphenylphosphino)ethane (diphos), 1,3-bis-(diphenylphosphino)propane (prophos), 2,2’-bis(diphenylphosphino)-1,1’-binaphthyl (binap) and hfac = hexafluoroacetylacetonate were synthesized and spectroscopically characterized. In the solid state or in solutions of non-polar solvents these compounds are yellow owing to a long-wavelength (hfac− →P-P) ligand-to-ligand charge transfer absorption. In coordinating solvents such as CH3CN the complexes undergo a reversible dissociation according to the equation: Cu(P-P)(hfac) + n CH3CN ⇌ [Cu(P-P)(CH3CN)n]+h

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Dosman, Cara F., and Richard L. Jones. "High-Frequency Chest Compression: A Summary of the Literature." Canadian Respiratory Journal 12, no. 1 (2005): 37–41. http://dx.doi.org/10.1155/2005/525813.

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The purpose of the present literature summary is to describe high-frequency chest compression (HFCC), summarize its history and outline study results on its effect on mucolysis, mucus transport, pulmonary function and quality of life. HFCC is a mechanical method of self-administered chest physiotherapy, which induces rapid air movement in and out of the lungs. This mean oscillated volume is an effective method of mucolysis and mucus clearance. HFCC can increase independence. Some studies have shown that HFCC leads to more mucus clearance and better lung function compared with conventional ches

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ter Wee, René D., and Bernardus J. Thio. "The Effect of High Flow Nasal Cannula Therapy in Exercised-Induced Asthma of Children." Journal of Respiration 1, no. 3 (2021): 197–203. http://dx.doi.org/10.3390/jor1030018.

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High flow nasal cannula (HFNC) therapy is a non-invasive oxygen delivery mode which is safe and well tolerated by adults and children with respiratory distress. HFNC is increasingly used in children with respiratory distress due to mucus retention, such as bronchiolitis and acute asthma. However, he effectiveness of this therapy in acute asthma has not been well researched. To evaluate HFNC for acute childhood asthma, we designed a randomized prospective crossover trial. In the trial, children aged 6–18 years, with a forced expiratory volume in one second (FEV1) lability of ≥30% during an exer

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Dafydd, Carwyn, Benjamin J. Saunders, Sarah J. Kotecha, and Martin O. Edwards. "Efficacy and safety of high flow nasal oxygen for children with bronchiolitis: systematic review and meta-analysis." BMJ Open Respiratory Research 8, no. 1 (2021): e000844. http://dx.doi.org/10.1136/bmjresp-2020-000844.

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BackgroundTo assess the published evidence to establish the efficacy and safety of high flow oxygen cannula (HFNC) as respiratory support for children up to 24 months of age with bronchiolitis within acute hospital settings.MethodsWe searched eight databases up to March 2021. Studies including children up to 24 months of age with a diagnosis of bronchiolitis recruited to an randomised controlled trial were considered in the full meta-analysis. At least one arm of the study must include HFNC as respiratory support and report at least one of the outcomes of interest. Studies were identified and

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Kim, Eunhye, Kyeongman Jeon, Dong Kyu Oh, et al. "Failure of High-Flow Nasal Cannula Therapy in Pneumonia and Non-Pneumonia Sepsis Patients: A Prospective Cohort Study." Journal of Clinical Medicine 10, no. 16 (2021): 3587. http://dx.doi.org/10.3390/jcm10163587.

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Despite the increasing use of high-flow nasal cannulas (HFNCs) to treat critically ill patients, data on their effectiveness for sepsis patients remains very limited. We studied a prospective cohort of sepsis patients from the Korean Sepsis Registry (18 intensive care units (ICUs)). Patients started on HFNC therapy for hypoxemia within the first three ICU days were enrolled. HFNC failure was defined as intubation or ICU death, and the primary outcome was early HFNC failure occurring within 72 h of HFNC initiation. Of 901 patients with sepsis admitted to the ICU, 206 who received HFNC therapy w

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Garland, Hilarie. "Impact of high flow nasal cannula implementation on the rate of intubation for bronchiolitis in Canada." Paediatrics & Child Health 23, suppl_1 (2018): e32-e32. http://dx.doi.org/10.1093/pch/pxy054.082.

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Abstract BACKGROUND Bronchiolitis affects more than one-third of children less than two years of age and is the most common reason for admission to hospital in the first year of life. Hospitalization rates have been on the rise, leading to an increase in healthcare expense, morbidity and impact on families. Bronchiolitis can have a heavy burden on health care resources including intubation and Intensive Care Unit (ICU) admissions. Non-invasive respiratory support with high-flow nasal cannula (HFNC) is being used more routinely in paediatric centers, though evidence of efficacy in bronchiolitis

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Kuwata, Seiko, Clara Kurishima, Jeonghye Kim, et al. "Clinical Evaluation of the Hemodynamic Effects of the High-Flow Nasal Cannula Therapy on the Fontan Circulation." Clinical Medicine Insights: Cardiology 9 (January 2015): CMC.S26137. http://dx.doi.org/10.4137/cmc.s26137.

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High-flow nasal cannula (HFNC) therapy supports respiratory effort with a minimal elevation in airway pressure. We examined hemodynamic effects of HFNC therapy in a 10-year-old girl with Fontan circulation, in which positive airway pressure has deleterious hemodynamic effects. The HFNC therapy at 30 L/min improved oxygenation without an increase in central venous pressure. It also reduced heart rate, and systemic and pulmonary vascular resistance, and increased cardiac output. In addition, the HFNC therapy improved the cerebral circulation measured by near-infrared spectroscopy. Thus, HFNC the

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Lee, Patrick, and Steven Salhanick. "Carbon Monoxide Poisoning Effectively Treated with High-flow Nasal Cannula." Clinical Practice and Cases in Emergency Medicine 4, no. 1 (2019): 42–45. http://dx.doi.org/10.5811/cpcem.2019.9.43618.

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Carbon monoxide (CO) poisoning is typically treated by administration of oxygen via non-rebreather mask (NRB). High-flow nasal cannula (HFNC) is an alternative to NRB in a variety of disease states. We report a case of the novel use of HFNC in the treatment of acute CO poisoning. A 29-year-old man presented with a carboxyhemoglobin (COHb) level of 29.8%. He was treated with HFNC, and COHb levels declined to 5.4% in 230 minutes. Given several theoretical advantages of HFNC relative to NRB, HFNC is a potential option for use in the treatment of CO poisoning.

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Zhuang, Zhen-Jie, Chao-Wen Shan, Bo Li, et al. "Linarin Enriched Extract Attenuates Liver Injury and Inflammation Induced by High-Fat High-Cholesterol Diet in Rats." Evidence-Based Complementary and Alternative Medicine 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/4701570.

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The aim of this study was to explore the potential beneficial effects of linarin enriched Flos Chrysanthemi extract (Lin-extract) on nonalcoholic steatohepatitis (NASH) induced by high-fat high-cholesterol (HFHC) diet in rats. SD rats received normal diet, HFHC diet, or HFHC diet plus different doses of Lin-extract. The liver content of triglyceride and total cholesterol markedly increased in HFHC diet-fed model rats while middle and high dose of Lin-extract lowered liver cholesterol significantly. The expression of stearoyl-CoA desaturase (SCD1) was upregulated by HFHC diet and further elevat

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Cartea, Álvaro, and José Penalva. "Where is the Value in High Frequency Trading?" Quarterly Journal of Finance 02, no. 03 (2012): 1250014. http://dx.doi.org/10.1142/s2010139212500140.

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We analyze the impact of high frequency (HF) trading in financial markets based on a model with three types of traders: liquidity traders (LTs), professional traders (PTs), and high frequency traders (HFTs). Our four main findings are: (i) The price impact of liquidity trades is higher in the presence of the HFTs and is increasing with the size of the trade. In particular, we show that HFTs reduce (increase) the prices that LTs receive when selling (buying) their equity holdings. (ii) Although PTs lose revenue in every trade intermediated by HFTs, they are compensated with a higher liquidity d

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Schwandt, W. Franklin, Toby J. Woods, and Gregory S. Girolami. "Crystal structure of tetrakis(1,1,1,5,5,5-hexafluoroacetylacetonato)hafnium(IV)." Acta Crystallographica Section E Crystallographic Communications 74, no. 8 (2018): 1182–85. http://dx.doi.org/10.1107/s2056989018010514.

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The crystal structure of the title compound, [Hf(C5HF6O2)4], has been determined. The asymmetric unit contains two Hf(hfac)4 molecules (hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate); both are located on general positions and have identical structures apart from the disorder involving three CF3 groups in one of the two molecules. The molecules of Hf(hfac)4 are arranged in layers that are parallel to the ab plane, and the coordination geometry of each hafnium(IV) center is a distorted square antiprism. An interesting aspect of the structure is that the hfac ligands are arranged so that the Hf(hf

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Cheng, Chang, Wang, Hsiao, Lai, and Chao. "The Impact of High-Flow Nasal Cannula on the Outcome of Immunocompromised Patients with Acute Respiratory Failure: A Systematic Review and Meta-Analysis." Medicina 55, no. 10 (2019): 693. http://dx.doi.org/10.3390/medicina55100693.

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Background and objectives: High-flow nasal cannula (HFNC) can be used as a respiratory support strategy for patients with acute respiratory failure (ARF). However, no clear evidence exists to support or oppose HFNC use in immunocompromised patients. Thus, this meta-analysis aims to assess the effects of HFNC, compared to conventional oxygen therapy (COT) and noninvasive ventilation (NIV), on the outcomes in immunocompromised patients with ARF. The Pubmed, Embase and Cochrane databases were searched up to November 2018. Materials and Methods: Only clinical studies comparing the effect of HFNC w

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Ko, Ryoung-Eun, Chul Park, Jimyoung Nam, et al. "Effect of post-extubation high-flow nasal cannula on reintubation in elderly patients: a retrospective propensity score-matched cohort study." Therapeutic Advances in Respiratory Disease 14 (January 2020): 175346662096849. http://dx.doi.org/10.1177/1753466620968497.

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Background: Studies of mechanically ventilated patients with a low risk of reintubation have suggested that the use of high-flow nasal cannula (HFNC) oxygen therapy reduces the risk of reintubation compared with conventional oxygen therapy (COT). However, the effect of HFNC following extubation in elderly patients with a high risk of reintubation remains unclear. Methods: All consecutive medical intensive care unit (ICU) patients aged >65 years who were mechanically ventilated for >24 h were prospectively registered between July 2017 and June 2018. Control was obtained from a historical

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Zhang, Neil S., Jeffrey Schonberg, S. Leonard Syme, and Colette L. Auerswald. "“My Hope Is . . . ”: A Hope-Based Typology of Homeless Youth." Youth & Society 52, no. 8 (2019): 1523–43. http://dx.doi.org/10.1177/0044118x19826418.

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Many youth experiencing homelessness (YEH) are surprisingly hopeful. We propose a typology of the hopes for the future (HFTF) of YEH, based on a qualitative study employing grounded theory. YEH fell into four categories: (a) nonmainstream HFTF youth who wished to escape the mainstream, (b) mainstream HFTF youth who wished to integrate into the mainstream, (c) marijuana-economy HFTF youth who aspired to escape homelessness by entering the marijuana economy, and (d) no HFTF youth who did not or could not envision the future. Our finding that some YEH transition between different HFTF suggests a

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