Relevant bibliographies by topics / HFTC

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'HFTC'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "HFTC"

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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 (July 20, 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 our department with the first documented case of pathologic fracture occurring secondary to the disease. Our report introduces this new phenotypic presentation, suggests a potential role for prophylactic bone screening, and highlights the need for preconception genetic screening in selected populations.
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Augustson, Erik, Michael M. Engelgau, Shu Zhang, Ying Cai, Willie Cher, Richun Li, Yuan Jiang, Krystal Lynch, and Julie E. Bromberg. "Text to Quit China: An mHealth Smoking Cessation Trial." American Journal of Health Promotion 31, no. 3 (January 5, 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 containing smoking cessation advice, encouragement, and health education information. The low-frequency text contact (LFTC) group received one weekly message with smoking health effects information. Measures. Our primary outcome was smoking status at 0, 1, 3, and 6 months after intervention. Secondary outcomes include participant perceptions of the HFTC intervention, and factors associated with smoking cessation among HFTC participants. Analysis. Descriptive and χ2 analyses were conducted to assess smoking status and acceptability. Factors associated with quitting were assessed using multiple logistic regression analyses. Results. Quit rates were high in both the HFTC and LFTC groups (HFTC: 0 month, 27.9%; 1 month, 30.5%; 3 months, 26.7%; and 6 months, 27.7%; LFTC: 0 month, 26.7%; 1 month, 30.4%; 3 months, 28.1%; and 6 months, 27.7%), with no significant difference between the two groups in an intent-to-treat analysis. Attitudes toward the HFTC intervention were largely positive. Conclusion. Our findings suggest that a text message–based smoking cessation intervention can be successfully delivered in China and is acceptable to Chinese smokers, but further research is needed to assess the potential impact of this type of intervention.
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Carrara, Guilherme M. P., Gabriela B. Silva, Lucas S. Faria, Daniela S. Nunes, Vanessa S. Ribeiro, Camila A. Lopes, Maria do Rosário F. Gonçalves-Pires, et al. "IgY antibody and human neurocysticercosis: a novel approach on immunodiagnosis using Taenia crassiceps hydrophobic antigens." Parasitology 147, no. 2 (October 23, 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 the IgY obtention process. Antigen recognition tests were carried out by Western blotting and immunofluorescence antibody test using purified and specific anti-hFTc IgY antibodies for detection of parasitic antigens of T. crassiceps and T. solium metacestodes. Sandwich ELISA was performed to detect circulating immune complexes formed by IgG and parasitic antigens in human sera. The results showed high diagnostic values (93.2% sensitivity and 94.3% specificity) for immune complexes detection in human sera with confirmed NCC. In conclusion, specific IgY antibodies produced from immunized hens with hFTc antigens were efficient to detect T. solium immune complexes in human sera, being an innovative and potential tool for NCC immunodiagnosis.
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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 networks, make the network to send more packets, and prolong the network life effectively.
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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 (December 27, 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 hyperphosphatemia and subdermal calcified tumors. However, GALNT3 is expressed in other tissues in addition to bone, suggesting that systemic loss could result in other pathologies. Using semiquantitative real-time PCR, we found that Galnt3 is the major O-glycosyltransferase expressed in the secretory cells of salivary glands. Additionally, 16S rRNA gene sequencing revealed that the loss of Galnt3 resulted in changes in the structure, composition, and stability of the oral microbiome. Moreover, we identified the major secreted salivary mucin, Muc10, as an in vivo substrate of Galnt3. Given that mucins and their O-glycans are known to interact with various microbes, our results suggest that loss of Galnt3 decreases glycosylation of Muc10, which alters the composition and stability of the oral microbiome. Considering that oral findings have been documented in HFTC patients, our study suggests that investigating GALNT3-mediated changes in the oral microbiome may be warranted.
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Vieira, Alexandre R., Moses Lee, Filippo Vairo, Julio Cesar Loguercio Leite, Maria Cristina Munerato, Fernanda Visioli, Stéphanie Rodrigues D’Ávila, 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 (December 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, Ruslan Kubant, Erland Arning, Teodoro Bottiglieri, Zdenka Pausova, and G. Harvey Anderson. "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 (May 29, 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 study was to examine the mechanisms and effects of choline content in high FA maternal diets on in-utero programming of energy regulation and later-life offspring phenotype. Methods Pregnant Wistar rats were fed an AIN-93 G diet with recommended FA and choline (1X, RFRC, control), or 5X-FA diet with choline at 0.5X-(HFLC), 1X-(HFRC), or 2.5X- (HFHC). In pups at birth, brain and liver 1-carbon metabolites, hypothalamic DNA methyltransferase (DNMT) activity and global DNA methylation (5-mC%) were measured. At weaning, one male pup/dam was fed the control diet and weekly weight-gain and food intake were recorded for 20 weeks. Results Offspring born to dams on the HFLC and HFRC, but not HFHC diet, had higher food intake (P < 0.05) and weight-gain (P < 0.01) than controls. In liver at birth, free choline was lower in HFHC than in HFLC pups, but betaine was unaffected. In contrast, in brains, betaine but not free choline concentrations, directly reflected the maternal choline diets. These results suggest that choline may modulate central food intake pathways via the methyl-donor betaine, warranting further investigation. Hypothalamic DNMT activity was highest (P < 0.05) in HFLC pups but global methylation was not affected. Thus, gene expression by RNA sequencing and gene-specific methylation in the hypothalamus is in progress to elucidate the mechanisms underlying the observed phenotype. Conclusions Increased maternal choline mitigates the high FA diet induced increase in body weight and food intake in the adult offspring and results in tissue-specific changes in 1-carbon metabolism at birth. These findings have potential application to human health, providing support to optimize choline and FA intakes by women of childbearing age. Funding Sources CIHR-INMD.
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Brogaard, Jonathan, and Corey Garriott. "High-Frequency Trading Competition." Journal of Financial and Quantitative Analysis 54, no. 4 (September 19, 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 quantity-competitor framework.
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Frim, J., and M. B. Ducharme. "Heat flux transducer measurement error: a simplified view." Journal of Applied Physiology 74, no. 4 (April 1, 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 above and below the HFT has been developed and has been verified experimentally. The theory is presented in a graph that can be used to drive the HFT correction factor directly or as a guide to know that heat flux was measured within a certain accuracy. This may obviate the use of complicated procedures and equations to perhaps needlessly apply a small correction factor to HFT data.
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Kuyk, T. "Telescopic Low Vision Aids with Motorized and Auto Focuses." Journal of Visual Impairment & Blindness 90, no. 4 (July 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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Dissertations / Theses on the topic "HFTC"

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Dung, Tran BA Viet, and n/a. "Teaching listening skills to students of commerce at Hanoi Foreign Trade College." University of Canberra. Education, 1989. http://erl.canberra.edu.au./public/adt-AUC20060706.122222.

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There is a great need for competent teaching of Business English in tertiary institutions in Vietnam. At the Hanoi Foreign Trade College (HFTC) alone, about 150 students per year seek training to equip them to work in export and import organizations, banks for foreign trade and customs departments. In teaching such students, one problem is the provision of interesting and relevant materials. This study addresses the question of selection of materials and techniques for teaching business English listening skills. This Field Study Report consists of five chapters. Chapter 1 describes the purposes and aims of study, the background to this study, dealing with students, the teaching and the curriculum. Chapter 2 looks at the general theory about listening and in particular listening in business. The chapter also describes listening requirements for business graduates from the HFTC. Chapter 3 discusses criteria for selection of textbooks for language teaching in general and for teaching listening skills in business English in particular. Chapter 4 surveys the teaching of business English in two institutes of Technical and Further Education in the Australian Capital Territory (ACT). The final chapter makes suggestions for priorities to improve the teaching of business English. This Field Study Report should be regarded as an exploratory attempt in choosing classroom techniques and materials for teaching listening skills to students of commerce at the Hanoi Foreign Trade College.
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HE, ZHENG. "HFTS AND NON-HFTS ALONG THE LIMIT ORDER BOOK." OpenSIUC, 2020. https://opensiuc.lib.siu.edu/dissertations/1857.

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Using NASDAQ high frequency trading (HFT) and minute-by-minute Limit Order Book (LOB) data over 120 sample stocks in 10 weeks between 2008-2010, including the week of the Lehman Brothers crisis, we study how trading activities of HFTs, NHFTs (Non-HFTs) and their order placements interact, and affect overall market quality. We capture order placements via the depth (step) and the height (price) dimensions along the LOB. We first document that HFTs are active not only at the top of the LOB, but their orders are placed along the LOB with an average around the 5th step, slightly ahead of NHFTs who on average are close to the 6th step. Generally, both HFTs and NHFTs are more aggressive in order placement with large stocks and hidden orders and HFT orders are further ahead during the crisis week, though price-wise they all back off somewhat with more conservative placements by NHFTs. In market turmoil, whenever HFTs see NHFTs trade among themselves, they become less aggressive in order placement. However, when HFTs trade, other HFT orders become more aggressive by moving ahead. On the contrary, NHFTs generally become more aggressive when other NHFTs supply liquidity in trading, and more conservative when HFTs are the supplier. We find mixed results on the impact of HFTs order placements and trading activities on market quality by different measures, but aggressive orders by HFTs and NHFTs both are related with decreases in short-term market volatility. Our findings highlight the importance of not only studying HFTs and NHFTs activities along the LOB, but also in both depth and height dimensions, instead of only at the market inside quotes.
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Johansson, Daniel. "Slutväxel HFT : Konstruktionskoncept för banddriven skotare." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-72675.

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Sveriges samlade skogsindustriföretag förutspår en förlust av marknadsandelar, eftersom man inte lyckas hålla samma tempo på produktionen som många andra länder. En orsak till detta är att skogsmaskinerna är för långsamma. Skotarna, vars uppgift är att förflytta virket från avverkningsplatsen till en uppsamlingsplats, bär en stor del av skulden. De hinner inte transportera virket tillräckligt snabbt. För att råda bot på detta ska en ny typ av skotare utvecklas, vars plattform inspireras av försvarsteknologi. Tack vare sin långa erfarenhet av banddrivna fordon har BAE Systems Hägglunds i Örnsköldsvik fått i uppdrag att konstruera en prototyp, som baseras på deras framgångsrika bandvagn, BvS10.[A]   Skotaren går under namnet Hybrid Forestry Truck (HFT), och är en banddriven skotare med fyra larvband. Framdrivningen är av seriehybridtyp, vilket betyder att en generator drivs av en dieselmotor. Dieselmotorn förser sedan fyra elmotorer, en i varje bandställ, med ström.   Detta examensarbete går ut på att utveckla länken mellan elmotorn och drivhjulen till banden. Tre designkoncept presenteras och analyseras. Den, i författarens åsikt, mest ideala lösningen utvecklas sedan vidare mer detaljerat. Många andra examensjobb, samt interna analyser av Hägglunds själva, har gjorts på HFT. Detta innebär att många kraftsituationer och belastningsfall redan är uträknade, samt att de flesta komponenterna till slutväxeln är utvalda.
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Fan, Haibo. "HfC structural foams synthesized from polymer precursors." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Dissertation/FAN_HAIBO_30.pdf.

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Björkman, Jonas, and Johan Durling. "The impact of high-frequency trading on the Swedish stock market – based on liquidity and volatility." Thesis, Linköpings universitet, Nationalekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148882.

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This paper studies how high-frequency trading (HFT) affects the Swedish stock market quality based on volatility and liquidity measures. Previous studies show ambiguous results where a few propose that HFT deteriorates market quality by increasing volatility and decreasing liquidity while some studies point in the opposite direction.By setting up a simultaneous equations system with instrumental variables and estimating the parameters with Generalized Methods of Moments (GMM), this paper finds that in the majority of the investigated stocks high-frequency trading activity reduces bid ask spreads and therefore increases liquidity, i.e. enhancing market quality. Additionally, the results also show that the volatility decreases through high-frequency trading activity. Hence, both measures are indicating that the market quality is positively affected by high-frequency trading.However, interesting is the analysis and discussion on whether high-frequency trading strategies such as spoofing and layering potentially can contribute to false liquidity. This would mean that the market quality is impaired due to HFT. This paper also examines the reversed relationship, how the liquidity and volatility affect HFT activity and conclude that HFT is not affected by how liquid or volatile the market is.
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Wheeler, Mark R. "The adsorption of HFC-134a onto zeolite Na-13X." Thesis, Brunel University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307487.

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Neilson, Martin M. "The bulk and surface properties of HFC replacement refrigerants." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312801.

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Sålder, Christofer, and Andreas Callander. "Fast or furious : Högfrekvenshandelns påverkan på privata aktiesparare." Thesis, Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-16192.

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Narasimhan, Anirudhan. "Commercialization of HFAC Electronic Nerve Block Technology to Treat Chronic Post Surgical Pain." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1290641992.

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Yan, Yu. "Performance optimisation of HFC refrigerants by experimental and mathematical methods." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248796.

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Books on the topic "HFTC"

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Trust, Home Farm. HFT Review. Bristol: HFT, 2000.

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Anderson, James W. The HFC guide book. [Lexington, KY: HCF Diabetes Foundation], 1987.

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(Firm), ICF Macro, ed. Namibia health facility census (HFC), 2009. Windhoek, Namibia: Ministry of Health and Social Services, 2011.

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Large, David. Broadband cable access networks: The HFC plant. 3rd ed. Boston: Morgan Kaufmann, 2008.

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Residential broadband networks: XDSL, HFC, and fixed wireless access. Upper Saddle River, NJ: Prentice Hall, 1998.

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Moore, Christopher Mark. Fluorine atom reactions and the photo-oxidation of HFC-134a. Birmingham: University of Birmingham, 1996.

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Video dialtone technology: Digital video over ADSL, HFC, FTTC, and ATM. New York: McGraw-Hill, 1995.

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Eckels, Steven J. In-tube evaporation and condensation of HFC-134a and CFC-12 with various lubricant mixtures. Ann Arbor, Mich: UMI Dissertation Services, 2002.

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World, Administrative Radio Conference for the Planning of the HF Bands Allocated to the Broadcasting Service (1987 Geneva Switzerland). Final acts of the World Administrative Radio Conference for the Planning of the HF Bands Allocated to the Broadcasting Service (HFBC-87), Geneva, 1987. Geneva: International Telecommunication Union, 1987.

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Toshiyuki, Kanakubo. Strain Hardening Cement Composites: Structural Design and Performance: State-of-the-Art Report of the RILEM Technical Committee 208-HFC, SC3. Dordrecht: Springer Netherlands, 2013.

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Book chapters on the topic "HFTC"

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Fiorentino, Giuseppe, Maurizia Lanza, Anna Annunziata, and Pasquale Imitazione. "The Role of HFNC." In Covid-19 Airway Management and Ventilation Strategy for Critically Ill Older Patients, 159–65. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-55621-1_17.

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Chawla, Rajesh, and Subhash Todi. "High Flow Nasal Canula (HFNC)." In ICU Protocols, 35–43. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0898-1_4.

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Zapata, Daniel, David Wisa, Bushra Mina, and Maciej Walczyszyn. "NPPV vs. HFNC for Acute Respiratory Failure." In Noninvasive Ventilation in Sleep Medicine and Pulmonary Critical Care, 315–23. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42998-0_32.

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Fan, Haibo, Nanda K. Ravala, Howard C. Wikle, and Bryan A. Chin. "HfC Structural Foams Synthesizing from Polymer Precursors." In Ceramic Transactions Series, 13–24. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118408391.ch2.

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Gresser, Uwe. "Typisierung und Prämissen GRESSER KI 10 HFT." In Praxishandbuch Hochfrequenzhandel Band 1, 387–94. Wiesbaden: Springer Fachmedien Wiesbaden, 2015. http://dx.doi.org/10.1007/978-3-658-04935-5_9.

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Garcia, Manuel, Daniel F. Garcia, Victor G. Garcia, and Ricardo Bonis. "Traffic Model Characterization of an HFC Network." In Lecture Notes in Computer Science, 539–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-45076-4_54.

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Pikrammenos, Giannis, and Leligou Helen-Catherine. "Performance Evaluation of Diffserv Driven HFC System." In Next Generation Networks. Networks and Services for the Information Society, 137–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-40019-2_12.

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Maginley, Ray. "Patient Care Issues in HFC Emissions Policy." In Non-CO2 Greenhouse Gases: Scientific Understanding, Control and Implementation, 477–83. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9343-4_73.

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McNaughton, D., C. Evans, and E. G. Robertson. "FT-IR Spectroscopy of the CFC Replacements HFC-152a and HFC-227ea in a Supersonic Jet Expansion." In Progress in Fourier Transform Spectroscopy, 543–46. Vienna: Springer Vienna, 1997. http://dx.doi.org/10.1007/978-3-7091-6840-0_134.

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Gresser, Uwe. "Co-Location und Latenz GRESSER KI 10 HFT." In Praxishandbuch Hochfrequenzhandel Band 1, 395–414. Wiesbaden: Springer Fachmedien Wiesbaden, 2015. http://dx.doi.org/10.1007/978-3-658-04935-5_10.

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Conference papers on the topic "HFTC"

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Story, Jon, and Chris Wyman. "HFTS." In SIGGRAPH '16: Special Interest Group on Computer Graphics and Interactive Techniques Conference. New York, NY, USA: ACM, 2016. http://dx.doi.org/10.1145/2897839.2927424.

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Nakayama, Masashi, Haruo Sato, Yutaka Sugita, Seiji Ito, Masashi Minamide, and Yoshito Kitagawa. "Low Alkaline Cement Used in the Construction of a Gallery in the Horonobe Underground Research Laboratory." In ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2010. http://dx.doi.org/10.1115/icem2010-40038.

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In Japan, any high level radioactive waste (HLW) repository is to be constructed at over 300 m depth below surface. Tunnel support is used for safety during the construction and operation, and shotcrete and concrete lining are used as the tunnel support. Concrete is a composite material comprised of aggregate, cement and various admixtures. Low alkaline cement has been developed for the long term stability of the barrier systems whose performance could be negatively affected by highly alkaline conditions arising due to cement used in a repository. Japan Atomic Energy Agency (JAEA) has developed a low alkaline cement, named as HFSC (Highly Fly-ash Contained Silicafume Cement), containing over 60 wt% of silica-fume (SF) and fly-ash (FA). HFSC was used experimentally as the shotcrete material in construction of part of the 140m deep gallery in the Horonobe Underground Research Laboratory (URL). The objective of this experiment was to assess the performance of HFSC shotcrete in terms of mechanics, workability, durability, and so on. HFSC used in this experiment is composed of 40 wt% OPC (Ordinary Portland Cement), 20 wt% SF, and 40 wt% FA. This composition was determined based on mechanical testing of various mixes of the above components. Because of the low OPC content, the strength of HFSC tends to be lower than that of OPC. The total length of tunnel using HFSC shotcrete is about 73 m and about 500 m3 of HFSC was used. The workability of HFSC shotcrete was confirmed in this experimental construction.
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Tipples, Rob, Sahet Keshiyev, Kian Sheikhrezaei, and Prabhakaran Centala. "Bit Design Methodology to Mitigate High-Frequency Torsional Oscillation." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206353-ms.

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Abstract This paper reviews field data where high-frequency torsional oscillation (HFTO) was seen on previous bit runs and hypothesizes on features or design metrics that may have directly influenced this vibration. This paper investigates four metrics of bit design: Cutter wear, shear length:shear area ratio, choice of secondary cutter material, and effective backrake. Hypotheses are established linking these metrics to HFTO, and then data from field runs is shown to correlate the hypotheses. At this point, a bit was designed and manufactured to put the HFTO avoidance hypotheses into practice. Prior to laboratory testing, a theoretical model is used to identify resonant torsional frequencies. A series of laboratory experiments followed to test the hypotheses and demonstrated that there is correlation between all factors, but in one case is counter to the hypothesis. This information is of use when selecting or designing bits in environments where HFTO is known to occur. The findings may also assist in explaining performance that's below expectations where HFTO is not able to be explicitly measured.
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Spencer, Reed W., John A. Bomidi, and Xu Huang. "Drill Bit Design Features that Initiate and Reduce High Frequency Torsional Oscillations." In SPE/IADC International Drilling Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204102-ms.

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AbstractThis paper reports the development of and the results of high frequency torsional oscillation (HFTO) tests performed on full-sized PDC drill bits and single cutters in a drilling laboratory. The research team used a pressurized laboratory drilling rig to test different drill bit designs in new and worn conditions. These tests were performed in different rock types, at different revolution per minute (RPM), weight on bit (WOB) and depth of cut (DOC) values. High frequency drill stem torque (5120 Hz) and in-bit tangential acceleration (1400 Hz) data were recorded, along with all other drilling parameters. Spectrograms of torque data were plotted to identify frequency changes in time. The torque data was filtered to remove the low frequency behavior and focus on the HFTO behavior. The high frequency torque signal correlates well with in-bit tangential accelerations. Root mean square (RMS) values of this filtered torque signal were calculated and plotted vs average WOB, depth of cut, and torque values. Sharp and worn bit geometry, were dull graded on a per cutter basis and were input to a 3D drilling modeling software and correlated with test data in order to determine the DOC at which wear flats or cutting faces engage the rock and cause changes in HFTO behavior. The main results from this research are 1) a lab test and data analysis were developed that can measure a drill bit's propensity to initiate HFTO vibrations in the BHA, 2) HFTO RMS high-pass filtered torque values generally increase with DOC, 3) bits in the new state show more HFTO behavior if cutter design is more aggressive, and 4) wear flat engagement causes high HFTO behavior.
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5

"Short Course High Frequency Design For Communications." In Short Course High Frequency Design for Communications. IEEE, 1996. http://dx.doi.org/10.1109/hfdc.1996.864089.

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Larson, L. "DBS, VSAT, and the future." In Short Course High Frequency Design for Communications. IEEE, 1996. http://dx.doi.org/10.1109/hfdc.1996.864094.

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Nilpueng, Kitti, and Somchai Wongwises. "Flashing Flow Mechanisms of HFC-134a and HFC-410a Through Short-Tube Orifices." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44258.

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In this study, the flow mechanisms of HFC-134a and HFC-410A, including flow pattern, pressure distribution, temperature distribution, and mass flow rate inside short-tube orifice are presented and compared under the same working temperature. The test runs are performed at condenser temperature ranging between 35 and 45°C, evaporator temperature ranging between 2 and 12°C, and degree of subcooling ranging between 1 and 12 °C. The results show that the temperature distribution along the short-tube orifice obtained from HFC-410A is slightly higher than that obtained from HFC-134a. On the other hand, the pressure distribution between both refrigerants shows the large difference. It is also found that the tendency of mass flow rate obtained from HFC-134a almost coincides with those obtained HFC-410A as the operating conditions and short-tube orifice size are varied. However, the average mass flow rate of HFC-134a is slightly lower than that of HFC-410A.
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Gillie, R., A. Nesbitt, R. Ramirez-Iniguez, B. G. Stewart, and G. Kerr. "Statistical analysis of simultaneous partial discharge measurements from IEC60270, HFCT and HFCT EMI methods." In 2015 IEEE Electrical Insulation Conference. IEEE, 2015. http://dx.doi.org/10.1109/icacact.2014.7223573.

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Gillie, R., A. Nesbitt, R. Ramirez-Iniguez, B. G. Stewart, and G. Kerr. "Correlation of IEC60270, HFCT RF spectra and HFCT PQN patterns for HV cable fault." In 2014 IEEE Electrical Insulation Conference (EIC). IEEE, 2014. http://dx.doi.org/10.1109/eic.2014.6869337.

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Dalkilic¸, Ahmet Selim, and Somchai Wongwises. "Comparison of Various Alternative Refrigerants for Vapour Compression Refrigeration Systems." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44267.

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Single-stage vapour compression refrigeration system was compared with an actual vapour compression cycle, single-stage process with internal heat exchanger, and a two-stage process with economiser using the refrigerants of HCFC-22, CFC-502 and their alternatives such as HFC-134a, HFC-32, HFC-152a, HFC-404A, HFC-407C, HFC-507, HFC-410A. A theoretical performance study on a cascade refrigeration system was performed using two refrigeration cycles connected through the heat exchanger in the middle working as the evaporator for the high pressurized cycle and condenser for the low pressurized cycle. Other performance study was performed using a two-stage cascade refrigeration system having low and high pressure compressors connected through the mixing chamber in the middle. The condensation temperatures were between 30 and 50 °C, evaporation temperatures were between −50 °C and 5 °C and heat exchanger and economiser temperatures were kept as constant for the comparisons. Some of the alternative refrigerants’ coefficients of performance values are found to be higher than their base traditional pure refrigerants. The effects of the main parameters of performance analysis such as refrigerant type, degree of subcooling, and superheating on the performance coefficient, refrigerant charge rate and volumetric refrigeration capacity are investigated for various operating conditions as case studies.
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Reports on the topic "HFTC"

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Haynes, W. M. Thermophysical properties of HFC-143a and HFC-152a. Quarterly report, 1 January--31 March 1994. Office of Scientific and Technical Information (OSTI), April 1994. http://dx.doi.org/10.2172/10147087.

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Haynes, W. M. Thermophysical properties of HFC-143a and HFC-152a. Quarterly report, October 1, 1993--December 31, 1993. Office of Scientific and Technical Information (OSTI), January 1994. http://dx.doi.org/10.2172/10142930.

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Kayser, R. F. Thermophysical properties of HFC-143a and HFC-152a. Quarterly report, 1 April 1993--30 June 1993. Office of Scientific and Technical Information (OSTI), July 1993. http://dx.doi.org/10.2172/10143468.

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Haynes, W. M. Thermophysical properties of HFC-143a and HFC-152a. Quarterly report, 1 July 1993--30 September 1993. Office of Scientific and Technical Information (OSTI), October 1993. http://dx.doi.org/10.2172/10108097.

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Haynes, W. M. Thermophysical properties of HFC-143a and HFC-152a. Final report, April 1, 1993--June 30, 1994. Office of Scientific and Technical Information (OSTI), July 1994. http://dx.doi.org/10.2172/10191933.

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Domanski, Piotr A., Mark O. McLinden, Ian H. Bell, and Gregory T. Linteris. Low-GWP alternative refrigerant blends for HFC-134a. Gaithersburg, MD: National Institute of Standards and Technology, September 2018. http://dx.doi.org/10.6028/nist.tn.2014.

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Goetzler, W., L. Bendixen, and P. Bartholomew. Risk assessment of HFC-32 and HFC-32/134a (30/70 wt.%) in split system residential heat pumps. Final report. Office of Scientific and Technical Information (OSTI), April 1998. http://dx.doi.org/10.2172/607494.

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Bennett, M. V., and J. M. Bennett. Aircraft Engine/APU Fire Extinguishing System Design Model (HFC-125). Fort Belvoir, VA: Defense Technical Information Center, May 1997. http://dx.doi.org/10.21236/ada373212.

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Gunsel, Selda, and Michael Pozebanchuk. Elastohydrodynamic Lubrication with Polyolester Lubricants and HFC Refrigerants, Final Report, Volume 1. Office of Scientific and Technical Information (OSTI), April 1999. http://dx.doi.org/10.2172/8212.

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Gunsel, Selda, and Michael Pozebanchuk. Elastohydrodynamic Lubrication with Polyolester Lubricants and HFC Refrigerants, Final Report, Volume 2. Office of Scientific and Technical Information (OSTI), April 1999. http://dx.doi.org/10.2172/8217.

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