Relevant bibliographies by topics / TCPO

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Academic literature on the topic 'TCPO'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "TCPO"

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Steen, Jennifer A., Trudi L. Bannam, Wee Lin Teng, Rodney J. Devenish, and Julian I. Rood. "The Putative Coupling Protein TcpA Interacts with Other pCW3-Encoded Proteins To Form an Essential Part of the Conjugation Complex." Journal of Bacteriology 191, no. 9 (February 27, 2009): 2926–33. http://dx.doi.org/10.1128/jb.00032-09.

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ABSTRACT Conjugative plasmids encode antibiotic resistance determinants or toxin genes in the anaerobic pathogen Clostridium perfringens. The paradigm conjugative plasmid in this bacterium is pCW3, a 47-kb tetracycline resistance plasmid that encodes the unique tcp transfer locus. The tcp locus consists of 11 genes, intP and tcpA-tcpJ, at least three of which, tcpA, tcpF, and tcpH, are essential for the conjugative transfer of pCW3. In this study we examined protein-protein interactions involving TcpA, the putative coupling protein. Use of a bacterial two-hybrid system identified interactions between TcpA and TcpC, TcpG, and TcpH. This analysis also demonstrated TcpA, TcpC, and TcpG self-interactions, which were confirmed by chemical cross-linking studies. Examination of a series of deletion and site-directed derivatives of TcpA identified the domains and motifs required for these interactions. Based on these results, we have constructed a model for this unique conjugative transfer apparatus.
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Teng, Wee Lin, Trudi L. Bannam, Jennifer A. Parsons, and Julian I. Rood. "Functional Characterization and Localization of the TcpH Conjugation Protein from Clostridium perfringens." Journal of Bacteriology 190, no. 14 (May 16, 2008): 5075–86. http://dx.doi.org/10.1128/jb.00386-08.

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ABSTRACT In Clostridium perfringens, conjugative plasmids encode important virulence factors, such as toxins and resistance determinants. All of these plasmids carry a conjugation locus that consists of 11 genes: intP and tcpA to tcpJ. Three proteins, TcpA, a potential coupling protein, TcpF, a putative ATPase that is similar to ORF15 from Tn916, and TcpH, which contains VirB6-like domains, are essential for conjugation in the prototype conjugative plasmid pCW3. To analyze the functional domains of TcpH, a putative structural component of the mating-pair formation complex and deletion and site-directed mutants were constructed and analyzed. The results showed that the N-terminal 581 residues and the conserved 242VQQPW246 motif were required for conjugative transfer. Bacterial two-hybrid and biochemical studies showed that TcpH interacted with itself and with TcpC. An analysis of the tcpH mutants demonstrated that the region required for these interactions also was localized to the N-terminal 581 residues and that the function of the C-terminal region of TcpH was independent of protein-protein interactions. Finally, immunofluorescence studies showed that TcpH and TcpF were located at both cell poles of donor C. perfringens cells. The results provide evidence that TcpH is located in the cell membrane, where it oligomerizes and interacts with TcpC to form part of the mating-pair formation complex, which is located at the cell poles and is closely associated with TcpF.
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Wu, Daoxia, Dinghua Zhang, and Changfeng Yao. "Effect of Turning and Surface Polishing Treatments on Surface Integrity and Fatigue Performance of Nickel-Based Alloy GH4169." Metals 8, no. 7 (July 18, 2018): 549. http://dx.doi.org/10.3390/met8070549.

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In this paper, the effects of turning and surface polishing treatments on surface integrity and fatigue properties of superalloy GH4169 were investigated. Finish turning (FT), surface circumferential polishing treatment (TCP), surface oblique texture (TCPO), and surface axial texture (TCPA) were applied to GH4169 superalloy. The surface roughness, surface topography, residual stress, microhardness, and microstructure after different processes were studied. Rotating bending fatigue tests were carried out to investigate the effects of surface integrity and surface texture direction on the fatigue performance of GH4169. The experiments reveal that the TCPA specimens present the longest fatigue life of 15.01 × 104 cycles. By comparison with the FT, TCP, and TCPO specimens, the fatigue lives of TCPA specimens are increased by 134.2%, 183.7%, and 96.2%, respectively. Single crack initiation source is observed for TCPA specimen. It is mainly attributed to the small surface stress concentration factor and surface axial texture.
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Knight, Sarah L., Richard P. Taylor, Adrian A. Polliack, and Dan L. Bader. "Establishing predictive indicators for the status of loaded soft tissues." Journal of Applied Physiology 90, no. 6 (June 1, 2001): 2231–37. http://dx.doi.org/10.1152/jappl.2001.90.6.2231.

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Two complementary techniques were employed to assess the soft tissue response to applied pressure. The noninvasive methods involve the simultaneous measurement of the local tensions of oxygen and carbon dioxide (tcPo 2 and tcPco 2) and the collection and subsequent analysis of sweat collected from the sacrum, a common site for the development of pressure sores. All tests were performed on able-bodied subjects. Results have indicated that oxygen levels (tcPo 2) were lowered in soft tissues subjected to applied pressures of between 40 (5.3 kPa) and 120 mmHg (16.0 kPa). At the higher pressures, this decrease was generally associated with an increase in carbon dioxide levels (tcPco 2) well above the normal basal levels of 45 mmHg (6 kPa). There were also considerable increases, in some cases up to twofold, in the concentrations of both sweat lactate and urea at the loaded site compared with the unloaded control. By comparing selected parameters, a threshold value for loaded tcPo 2 was identified, representing a reduction of ∼60% from unloaded values. Above this threshold, there was a significant relationship between this parameter and the loaded/unloaded concentration ratios for both sweat metabolites. These parameters may prove useful in identifying those subjects whose soft tissue may be compromised during periods of pressure ischemia.
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Seinturier, Christophe, Sophie Blaise, Théophile Tiffet, Cynthia Brousseau Provencher, Jean Luc Cracowski, Gilles Pernod, and Patrick Carpentier. "Fluorescence angiography compared to toe blood pressure in the evaluation of severe limb ischemia." Vasa 49, no. 3 (April 1, 2020): 230–34. http://dx.doi.org/10.1024/0301-1526/a000853.

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Summary: Background: Severity of limb ischemia in peripheral arterial disease (PAD) patients is usually evaluated by clinical assessment and toe blood pressure (TBP) or transcutaneous oxygen pressures (TcPO 2). Indocyanin green angiography (IGA) is a promising tool generating a foot cartography of skin microvascular perfusion. However, there is no consensus about the fluorescence parameters that should be used to evaluate ischemia. The purpose of this cross-sectional evaluation and 3-month clinical follow-up was to determine the best fluorescence parameter for the evaluation of severe PAD, using TBP as reference. Patients and methods: IGA was realized in patients with clinical suspicion of CLI in addition to TBP and TcPO 2. Parameters from the time intensity fluorescence curve measured on the foot were compared with TBP (primary reference), and with TcPO2. Clinical outcomes (amputation, revascularization, death) were recorded at 3 months follow-up. Results: Thirty-four patients were included and IGA could be analysed in 29 of them. When all limbs were studied, no significant correlation was found between any of the measured fluorescence parameters (saturation time, ingress slope, amplitude, delay) and TBP pressure neither TCPO2. In the limbs with CLI, a significant correlation between the TBP and amplitude on the forefoot was found. According to the outcome, none of the fluorescence parameters showed a significant prognostic value in contrast to the significant results for TBP and TcPO2. Conclusions: In this study, quantitative analysis of IGA parameters did not show any prognostic value, nor was there any significant statistical association with well-established prognostic parameters such as TBP and TcPO 2 in patients with suspected CLI. A correlation was found between amplitude and TBP in patients with CLI. Topographical information such as perfusion heterogeneity was not evaluated and remains a valuable target to be investigated.
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Yu, Rosa R., and Victor J. DiRita. "Analysis of an Autoregulatory Loop Controlling ToxT, Cholera Toxin, and Toxin-Coregulated Pilus Production inVibrio cholerae." Journal of Bacteriology 181, no. 8 (April 15, 1999): 2584–92. http://dx.doi.org/10.1128/jb.181.8.2584-2592.1999.

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ABSTRACT Coordinate expression of many virulence genes in the human pathogenVibrio cholerae is controlled by the ToxR, TcpP, and ToxT proteins. These proteins function in a regulatory cascade in which ToxR and TcpP, two inner membrane proteins, are required to activatetoxT and ToxT is the direct activator of virulence gene expression. ToxT-activated genes include those whose products are required for the biogenesis of cholera toxin (CTX) and the toxin-coregulated pilus, the major subunit of which is TcpA. This work examined control of toxT transcription. We tested a model whereby activation of toxT by ToxR and TcpP is required to prime an autoregulatory loop in which ToxT-dependent transcription of the tcpA promoter reads through a proposed terminator between the tcpF and toxT genes to result in continued ToxT production. Primer extension analysis of RNA from wild-type classical strain O395 showed that there are two products encoding toxT, one of which is longer than the other by 105 bp. Deletion of the toxT promoter (toxTΔpro ) resulted in the abolishment oftoxT transcription, as predicted. Deletion of thetcpA promoter (tcpAΔpro ) had no effect on subsequent detection of the smaller toxT primer extension product, but the larger toxT product was not detected, indicating that this product may be the result of transcription from the tcpA promoter and not of initiation directly upstream of toxT. Neither mutant strain produced detectable TcpA, but the CTX levels of the strains were different. ThetoxTΔpro strain produced little detectable CTX, while the tcpAΔpro strain produced CTX levels intermediate between those of the wild-type andtoxTΔpro strains. Dependence oftoxT transcription on TcpP and TcpH was confirmed by analyzing RNAs from strains carrying deletions in the genes encoding these regulators. The tcpP defect resulted in undetectabletoxT transcription, whereas the tcpH mutation led to a diminishing of toxT RNA but not complete abolishment. Taken together, these results suggest thattoxT transcription is dependent on two different promoters; one is directly upstream and is activated in part by TcpP and TcpH, and the other is much further upstream and is activated by ToxT.
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Wisniewski, Jessica A., Wee L. Teng, Trudi L. Bannam, and Julian I. Rood. "Two Novel Membrane Proteins, TcpD and TcpE, Are Essential for Conjugative Transfer of pCW3 in Clostridium perfringens." Journal of Bacteriology 197, no. 4 (December 8, 2014): 774–81. http://dx.doi.org/10.1128/jb.02466-14.

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The anaerobic pathogenClostridium perfringensencodes either toxin genes or antibiotic resistance determinants on a unique family of conjugative plasmids that have a novel conjugation region, thetcplocus. Studies of the paradigm conjugative plasmid fromC. perfringens, the 47-kb tetracycline resistance plasmid pCW3, have identified severaltcp-encoded proteins that are involved in conjugative transfer and form part of the transfer apparatus. In this study, the role of the conserved hypothetical proteins TcpD, TcpE, and TcpJ was examined. Mutation and complementation analyses showed that TcpD and TcpE were essential for the conjugative transfer of pCW3, whereas TcpJ was not required. To analyze the TcpD and TcpE proteins inC. perfringens, functional hemagglutinin (HA)-tagged derivatives were constructed. Western blots showed that TcpD and TcpE localized to the cell envelope fraction independently of the presence of other pCW3-encoded proteins. Finally, examination of the subcellular localization of TcpD and TcpE by immunofluorescence showed that these proteins were concentrated at both poles ofC. perfringensdonor cells, where they are postulated to form essential components of the multiprotein complex that comprises the transfer apparatus.
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White, Augustus M., Deborah J. Ossip, L. Morgan Snell, Dongmei Li, Cosima Hoetger, Richard O'Connor, Rebecca C. Lester, et al. "Tobacco Product Access Scenarios Influence Hypothetical Use Behaviors." Tobacco Regulatory Science 7, no. 3 (May 1, 2021): 184–202. http://dx.doi.org/10.18001/trs.7.3.4.

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Objective: In this paper, we characterize how potential policies restricting access to tobacco products may impact use behaviors among adult, past 30-day, smokers and e-cigarette users. Methods: We conducted an online experiment with 820 smokers, e-cigarette users, and dual users (April 27-June 8, 2020). We randomized participants to one of 4 hypothetical access scenarios: (1) tobacco retail stores open + pharmacies open (TOPO); (2) tobacco stores open but favorite brand unavailable + pharmacies open (TOPO-NFB); (3) tobacco stores closed + pharmacies open (TCPO); and (4) tobacco stores closed + pharmacies closed (TCPC). Outcomes (measured on 0-100 visual analog scales) included the likelihood of quitting, reducing, switching brands or products, and finding another source of tobacco products. Seemingly unrelated regressions tested for associations between access scenarios and prospective tobacco use behaviors. Results: Participants in the TCPO and TOPO-NFB scenarios were more likely to reduce use, switch brands/products, and find another source (ps < .001) than those in the TOPO scenario. Dual and flavored product users were more likely to switch products (ps < .01). Conclusions: When tobacco retailers are closed, tobacco users may be more likely to quit and/or reduce use compared to when retailers are open. However, access restrictions could prompt users to switch tobacco brands/products or sources.
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Louie, Tai Man, Christopher M. Webster, and Luying Xun. "Genetic and Biochemical Characterization of a 2,4,6-Trichlorophenol Degradation Pathway in Ralstonia eutropha JMP134." Journal of Bacteriology 184, no. 13 (July 1, 2002): 3492–500. http://dx.doi.org/10.1128/jb.184.13.3492-3500.2002.

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ABSTRACT Ralstonia eutropha JMP134 can grow on several chlorinated aromatic pollutants, including 2,4-dichlorophenoxyacetate and 2,4,6-trichlorophenol (2,4,6-TCP). Although a 2,4,6-TCP degradation pathway in JMP134 has been proposed, the enzymes and genes responsible for 2,4,6-TCP degradation have not been characterized. In this study, we found that 2,4,6-TCP degradation by JMP134 was inducible by 2,4,6-TCP and subject to catabolic repression by glutamate. We detected 2,4,6-TCP-degrading activities in JMP134 cell extracts. Our partial purification and initial characterization of the enzyme indicated that a reduced flavin adenine dinucleotide (FADH2)-utilizing monooxygenase converted 2,4,6-TCP to 6-chlorohydroxyquinol (6-CHQ). The finding directed us to PCR amplify a 3.2-kb fragment containing a gene cluster (tcpABC) from JMP134 by using primers designed from conserved regions of FADH2-utilizing monooxygenases and hydroxyquinol 1,2-dioxygenases. Sequence analysis indicated that tcpA, tcpB, and tcpC encoded an FADH2-utilizing monooxygenase, a probable flavin reductase, and a 6-CHQ 1,2-dioxygenase, respectively. The three genes were individually inactivated in JMP134. The tcpA mutant failed to degrade 2,4,6-TCP, while both tcpB and tcpC mutants degraded 2,4,6-TCP to an oxidized product of 6-CHQ. Insertional inactivation of tcpB may have led to a polar effect on downstream tcpC, and this probably resulted in the accumulation of the oxidized form of 6-CHQ. For further characterization, TcpA was produced, purified, and shown to transform 2,4,6-TCP to 6-CHQ when FADH2 was supplied by an Escherichia coli flavin reductase. TcpC produced in E. coli oxidized 6-CHQ to 2-chloromaleylacetate. Thus, our data suggest that JMP134 transforms 2,4,6-TCP to 2-chloromaleylacetate by TcpA and TcpC. Sequence analysis suggests that tcpB may function as an FAD reductase, but experimental data did not support this hypothesis. The function of TcpB remains unknown.
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Sánchez, M. A., and B. González. "Genetic Characterization of 2,4,6-Trichlorophenol Degradation in Cupriavidus necator JMP134." Applied and Environmental Microbiology 73, no. 9 (February 23, 2007): 2769–76. http://dx.doi.org/10.1128/aem.02584-06.

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ABSTRACT The degradation pathway of 2,4,6-trichlorophenol (2,4,6-TCP), a hazardous pollutant, in the aerobic bacterium Cupriavidus necator JMP134(pJP4) (formerly Ralstonia eutropha JMP134) is encoded by the tcp genes. These genes are located in a genetic context, tcpRXABCYD, which resembles a putative catabolic operon. In this work, these gene sequences were individually disrupted and mutant strains were evaluated for their ability to grow on or degrade 2,4,6-TCP. The tcpX and tcpA mutants completely failed to degrade this compound. Although the tcpC mutant was also unable to grow on 2,4,6-TCP, it still transformed this chlorophenol to 6-chlorohydroquinol. In contrast, the tcpD mutant grew on 2,4,6-TCP, suggesting the presence of additional maleylacetate reductase-encoding genes. Five other open reading frames encoding maleylacetate reductases, in addition to the tcpD gene, were found in the genome of C. necator, and two of them provide this function in the tcpD mutant. The tcpR gene, encoding a putative LysR-type transcriptional regulator, was disrupted, and this mutant strain completely failed to grow on 2,4,6-TCP. Transcriptional fusion studies demonstrated that TcpR activates the expression of the tcp genes, responding specifically to 2,4,6-TCP. The transcriptional start of the tcp operon was mapped, and a putative σ70-type promoter was identified.
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Dissertations / Theses on the topic "TCPO"

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Evans, Raelene Nicole, and mikewood@deakin edu au. "Aqueous/Micellar peroxyoxalate chemiluminescent detection for ion chromatography." Deakin University. School of Biological and Chemical Sciences, 1998. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20051201.143852.

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This thesis covers the development of the traditionally fluorescent bis(8-quinolinol-5-sulfonic acid) magnesium (II) fluorophore as a chemiluminescent emitter. A brief description of luminescence spectroscopy and its application to analytical chemistry lays the foundation to the discussion of the results obtained herein. This includes the synthesis and identification of two so called ‘water soluble’ aryl oxamides 2,2’-oxalyl-bis(trifluoromethanesulfonyl) imino] ethylene-bis(N- methylpyridinium) trifluoromethane sulfonate (PETQ) and 2,2’-oxalyl-bis(trifluoromethanesulfonyl) imino]ethylene-bis(N-pyridinium) chloride (PETH), previously developed for the US navy as a possible emergency light source, yet the synthetic methodology were incomplete. The inconsistencies of the synthetic methods for PETQ and PETH were overcome with yields satisfactory for their preliminary analytical evaluation. The evaluation of these aryl oxamides, including 4,4’-oxalyI- bis[(trifluoromethanesulfonyl) imino]ethylene-bis(l-methyM-benzylpiperidinium) trifluoromethanesulfonate (BPTQ), 4,4’-oxalyl-bis [(trifluoromethylsulfonyl)imino] ethylene-bis(N-methylmorpholinium)trifluoromethanesulfonate (METQ) and the oxalate bis(2,4,6-trichlorophenyl) oxalate (TCPO) were performed with the peroxyoxalate chemiluminescent reaction using bis(8-quinolinol-5-sulfonic acid) magnesium (II) as the fluorophore. A univariate optimisation of this system resulted in 0,0082 mol 1-1 the detection limit of magnesium in the absence of cationic surfactants and 0.0041 mol 1-1 in their presence for the majority of these compounds. The oxamides were found to be insoluble in water with long ulrasonication periods required to dissolve the compound, with solvents such as acetonitrile preferred. The determination of other chemiluminescent metal-8HQS chelates to replace magnesium -8HQS in the peroxyoxalate were limited to Al (III), Cd (II), Ca (II), In (II) and Zn (II), unfortunately these metals all possessed poorer detection limits than those obtained using magnesium The base reaction conditions used for the flow injection system with chemiluminescent detection were transferred to an ion chromatographic configuration for the separation of magnesium from other cations on an exchange column. After a univariate and simplex optimisation of these conditions, the detection limit of magnesium was found to be 0.0411 mol 1-1 which was less than the limits that could be achieved with fluorescent detection, The further development of this reaction to incorporate the displacement of magnesium from Mg-EDTA by other metals that possessed a higher conditional stability constant than magnesium also proved to be problematic with interferences from not only EDTA but from the eluant (lactic acid) from the cation column. Using this system the detection limits of the displacing metals were found to be in the order of 10 mg 1-1 which was substantially less that what was observed when exactly the same configuration was used with fluorescent detection. The final component of the thesis entails the discussion of the background emission that results from the reaction of oxamides/oxalates with hydrogen peroxide. A detailed investigation into the reaction of TCPO and hydrogen peroxide in the presence of various additives, such as imidazole , heavy atoms and triethylamine illustrated the existence of a further intermediate in fee mechanism for this reaction. The species responsible for this emission was attributed to the degradation product 2,4,6-trichlorophenyi of TCPO, which was supported by the non-existent background present with the oxamides that do not contain this degradation product.
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Matsuda, Margareth Mie Nakamura. "Estudos da influência de surfactantes e determinação de cloro em água potável empregando-se TCPO e 2-NPO." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/46/46133/tde-22022018-111814/.

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As reações quimiluminescentes de oxalato de bis(2,4,6-triclorofenila) (TCPO) e oxalato de bis(2-nitrofenila) (2-NPO), com f1uoranteno como f1uoróforo, em sistemas micelares aquosos, foram estudadas na presença de alguns surfactantes. A oxidação destes oxalatos por peróxido de hidrogênio ou por hidroperóxido de t - butila produz quimiluminescência cuja intensidade depende da acidez e da presença de imidazol. A intensidade de quimiluminescência é maior na presença de alguns surfactantes, especialmente CTAC, OTAC, DDAB, DODAC e β-ciclodextrina. A reação de TCPO com cloro (HCIO, CIO- e Cl2) na presença de 9,10-difenilantraceno como fluoróforo, em meio de acetonitrila/água, também foi investigada. Um sistema de análise por injeção em fluxo para determinação de cloro com aplicação analítica em água de torneira foi desenvolvido. A faixa linear para a curva analítica de cloro e o limite de detecção foram, respectivamente: (0,2 - 3,0)x10-5 e 0,2 x10-5 mol L-1.
The chemiluminescent reactions of bis (2,4,6-trichlorophenyl) oxalate (TCPO) and bis(2-nitrophenyl) oxalate (2-NPO), with fluoranthene as fluorophore, in aqueous micellar systems, were studied in the presence of surfactants. The oxidation of these oxalates by hydrogen peroxide or t-butyl peroxide produces chemiluminescence, which depends on the acidity and imidazole presence. The chemiluminescent intensity is higher in the presence of some surfactants, especially CTAC, OTAC, DDAB, DODAC and β-cyclodextrine. The reaction of TCPO with free chlorine (HCIO, CIO- and Cl2), in the presence of 9,10-diphenylanthracene as fluorophore in acetonitrile/water medium, was also investigated. A flow injection analysis system, for free chlorine determination with analytical application in tap water was developed. The linear range for free chlorine and detection limit were, respectively: (0.2-3.0)x10-5 and 0.2x10-5 mol L-1.
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Santos, Cícero Marciano da Silva. "Análise dos indicadores do TCPO e de empresas construtoras de edificações verticais utilizados na elaboração de orçamentos por empresas de João Pessoa." Universidade Federal da Paraí­ba, 2010. http://tede.biblioteca.ufpb.br:8080/handle/tede/5279.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
This thesis deals with one the most important issues that include construction which is the production costs control. Due to the complexity of construction systems, companies find it difficult to determine and control costs during performance of services. In general this control is identify the variations between budgeted costs and actual consumption in the construction site. The traditional budgeting process is based of accounts plan which is nothing more than a subdivision of construction site model the estimated parameter is the service rates of standard productivity. In this sense, it is observed that these consumption rates of materials and labor force are taken from tables of composition of pre-defined prices, insensitive to regional variations and technology. This way the objective this thesis is making a comparison study between the indicators of TCPO and construction companies with the settlement on the spot used in the composition of unit costs for budgeting in buildings vertical construction in João Pessoa. For this it was carried out in loco research exploratory and descriptive about the variation of the indicators of composition raw materials e labor-intensive, analyzing the service more representative in costs into two companies midsize great and analyzed two construction sites in each company. As a result there was a wide variation between the consumption indicators adopted and the actual consumption of resources during the implementation of services, confirming the initial assumptions of the research
Esta dissertação trata de um dos mais importantes assuntos que englobam a construção civil, que é o controle de custos da produção. Devido à complexidade dos sistemas construtivos, as empresas encontram dificuldades em apurar e controlar os custos durante a execução dos serviços. De uma maneira geral, esse controle consiste na identificação das variações entre os custos orçados e o efetivo consumo no canteiro de obras. O processo de orçamentação tradicional baseia-se no plano de contas, que nada mais é que a subdivisão da obra em serviços aos quais são alocados os custos. A partir daí, são levantados os custos unitários, sendo cada serviço subdividido em insumos, os quais recebem índices de produtividade padrão. Neste modelo de formação de custo, o parâmetro orçado é o serviço. Neste sentido, observa-se que esses índices de consumo de materiais e mão-de-obra são retirados de tabelas de composição de preços pré-definidas, insensíveis às variações regionais e tecnológicas. Dessa forma, esta dissertação teve como objetivo, efetuar um estudo comparativo entre os indicadores do TCPO/empresas construtoras da grande João Pessoa, utilizados nas composições de preços unitários dos seus orçamentos, e os realmente utilizados pelas empresas construtoras em seus canteiros de obra. Para tal, foi realizada uma pesquisa de campo, exploratória e descritiva, acerca da variação de consumo dos indicadores de matéria-prima e mão-de-obra, onde foram analisados os serviços mais representativos, em termos de custos, em duas empresas de médio porte da grande João Pessoa, sendo analisadas duas obras em cada empresa. Como resultado, observou-se uma grande variação entre os indicadores de consumo adotados no orçamento e o efetivo consumo dos recursos durante a execução dos serviços, corroborando com os pressupostos iniciais da pesquisa.
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Reis, Roberta Albino dos. "Fluorescência e quimiluminescência para a determinação de mecanismos de reação na decomposição de ésteres." reponame:Repositório Institucional da UFABC, 2018.

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Orientador: Prof. Dr. Fernando Heering Bartoloni
Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Ciência e Tecnologia/Química, Santo André, 2018.
No presente trabalho estudou-se a aplicabilidade de fluorescencia (FL) e quimiluminescencia (CL) para a determinacao de mecanismos de reacao envolvendo esteres, um deles um ester derivado de lofina. A lofina e seus derivados, em geral, apresentam rendimentos quanticos de fluorescencia (¿³FL) com valores relativamente altos (¿³FL > 0,1), tornando essas moleculas amplamente utilizadas em estudos CL e FL. A decomposicao do ester de lofina (acetato de 4-(4,5-difenil-1H-imidazol-2-il)fenila, 1) foi estudada em meio alcalino alcoolico utilizando como solventes MeOH e iPrOH, e como bases HO., tBuO., DBU e TEA. Duas metodologias de acompanhamento de cinetica por emissao foram comparadas: observando a formacao do produto (¿Éex = 350 nm e ¿Éem = 475 nm) e o consumo do ester 1 (¿Éex = 300 nm e ¿Éem = 400 nm). Ambas apresentaram resultados equivalentes para as constantes de velocidade observadas. Tanto em MeOH quanto em iPrOH, o possivel mecanismo ocorre por uma via classica BAC2, envolvendo a base conjugada do solvente (i.e., MeO. ou iPrO.) como nucleofilo, gerada por CBE quando HO., tBuO. e DBU foram empregados como catalisadores (kbim = 4,5.6,5 L mmol.1 s.1). Para TEA, uma constante kbim tres ordens de grandeza inferior foi obtida, representando uma possivel mudanca no mecanismo de reacao, provavelmente, para catalise nucleofilica. A solvolise neutra do ester se mostrou particularmente significativa quando baixas concentracoes de catalisador foram utilizadas. Na segunda parte deste trabalho, referente a reacao peroxioxalato, a degradacao do oxalato de bis(2,4,6-triclorofenila) (TCPO) foi estudada em MeOH e comparada ao sistema classico (em EtOAc, com catalise por imidazol). Ensaios cineticos de emissao e absorcao permitiram verificar que a metanolise se mostrou proeminente frente a peridrolise. Por ensaios de absorcao, foi possivel determinar que a primeira eliminacao de um residuo fenolico ocorre mais rapidamente que a segunda (kABS1 > kABS2), contrariamente ao observado no sistema classico, tanto para metanolise quanto peridrolise. Observou-se que a adicao de EtOAc ao meio protico polar muda o comportamento cinetico da reacao, aproximando-o ao do sistema classico. Propos-se um modelo cinetico final, indicando quais etapas sao lentas, rapidas e muito rapidas, dentro do processo estudado.
The use of fluorescence (CL) and chemiluminescence (FL) for the determination of reaction mechanisms involving esters was studied in this work, one of them is a lophine derived ester. Lophine and its derivatives generally have quantum fluorescence yields (ÖFL) with relatively high values (ÖFL> 0.1), making these molecules widely used in CL and FL studies. The decomposition of a lophine derived ester (4-(4,5-diphenyl-1H-imidazol-2-yl)phenyl acetate, 1) was studied in basic alcoholic media using MeOH and iPrOH as solvents, and HO¿, tBuO¿, DBU and TEA as bases. Two methodologies for tracking emission kinetics were compared: observing product formation (ëex = 350 nm and ëem = 475 nm) and ester 1 consumption (ëex = 300 nm and ëem = 400 nm). Both methods showed equivalent results for the obtained observed rate constants. Possibly the reaction mechanism follows a BAC2 pathway, in both MeOH and iPrOH, involving the solvent conjugate base (i.e., MeO¿ or iPrO¿) as nucleophile, generated by SBC when HO¿, tBuO¿ and DBU were used as catalysts (kbim = 4.5¿6.5 L mmol¿1 s¿1). For TEA, the obtained kbim was three orders of magnitude smaller, indicating a possible change in reaction mechanism, probably to nucleophilic catalysis. The ester¿s neutral solvolysis showed to be particularly significant when low concentrations of catalyst were used. At the second section of this work, regarding the peroxyoxalate reaction, the degradation of bis(2,4,6-trichlorophenyl)oxalate (TCPO) was studied in MeOH and compared to the classical system (in EtOAc, with imidazole catalysis). Emission and absorption kinetic assays allowed to conclude that methanolysis overcomes perhydrolysis. Through absorption measurements, it was possible to verify that the elimination of the first phenolic residue occurs faster than the second (kABS1 > kABS2), contrarily to the observation in the classical system, for both methanolysis and perhydrolysis. It was observed that the addition of EtOAc to the protic polar media changes the kinetical behavior of the reaction, approximating it to the classical system. A final kinetic model was proposed, stating which are the slow, fast and very fast steps, within the studied process.
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Feleke, Abisake. "Determination of Cholesterol in Foods by Flow Injection Analysis with Perroxyoxalate Chemiluminescence." Digital Commons @ East Tennessee State University, 2006. https://dc.etsu.edu/etd/2231.

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Cholesterol is an important biological molecule with many important functions. However, high serum cholesterol is a health hazard. Thus analysis of cholesterol is important and many analytical techniques have been developed. The objectives of the proposed research are to develop an economical, rapid method for the determination of total cholesterol with good selectivity and enhanced sensitivity. For evaluation of proposed flow injection analysis with peroxyoxalate chemiluminescence (FIA-POCL) method, figures of merit such as accuracy, precision, and linear dynamic range will be assessed. The proposed procedure was then applied to the determination of total cholesterol in foods. The procedure was linear for cholesterol from 0.01 to 0.120 mg/mL. The relative standard deviation was 2.57%. The recoveries were 97.5-103.3% for commercial standard cholesterol sample, and 101.5-108.0% for butter. The proposed method was applied to analysis of cholesterol in food and the results were consistent with expected values.
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BONAM, VEERA VENKATA SIVARAMAKRISHNA. "Multipath TCP and Measuring end-to-end TCP Throughput : Multipath TCP Descriptions and Ways to Improve TCP Performance." Thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-17075.

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Internet applications make use of the services provided by a transport protocol, such as TCP (a reliable, in-order stream protocol). We use this term Transport Service to mean the end-to- end service provided to application by the transport layer.   That service can only be provided correctly if information about the intended usage is supplied from the application. The application may determine this information at the design time, compile time, or run time, and it may include guidance on whether a feature is required, a preference by the application, or something in between. Multipath TCP (MPTCP) adds the capability of using multiple paths to a regular TCP session. Even though it is designed to be totally backward compatible to applications. The data transport differs compared to regular TCP, and there are several additional degrees of freedom that the particular application may want to exploit.   Multipath TCP is particularly useful in the context of wireless networks using both Wi-Fi and a mobile network is a typical use case. In addition to the gains in throughput from inverse multiplexing, links may be added or dropped as the user moves in or out of coverage without disrupting the end-to-end TCP connection. The problem of link handover is thus solved by abstraction in the transport layer, without any special mechanisms at the network or link level.   Handover functionality can then be implemented at the endpoints without requiring special functionality in the sub-networks according to the Internet's end-to-end principle. Multipath TCP can balance a single TCP connection across multiple interfaces and reach very high throughput.
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SANA, VINEESHA. "Multipath TCP and Measuring endto-end TCP Throughput : Measuring TCP Metrics and ways to improve TCP Throughput performance." Thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-17098.

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Internet applications make use of the services provided by a transport protocol, such as TCP (a reliable, in-order stream protocol). We use the term Transport Service to mean the endtoend service provided to application by the transport layer. That service can only be provided correctly if information about the intended usage is supplied from the application. The application may determine this information at the design time, compile time, or run time, and it may include guidance on whether a feature is required, a preference by the application, or something in between. Multipath TCP (MPTCP) adds the capability of using multiple paths to a regular TCP session. Even though it is designed to be totally backward compatible to applications. The data transport differs compared to regular TCP, and there are several additional degrees of freedom that the particular application may want to exploit. Multipath TCP is particularly useful in the context of wireless networks using both Wi-Fi and a mobile network is a typical use case. In addition to the gains in throughput from inverse multiplexing, links may be added or dropped as the user moves in or out of coverage without disrupting the end-to-end TCP connection. The problem of link handover is thus solved by abstraction in the transport layer, without any special mechanisms at the network or link level. Handover functionality can then be implemented at the endpoints without requiring special functionality in the sub-networks according to the Internet's end-to-end principle. Multipath TCP can balance a single TCP connection across multiple interfaces and reach very high throughput.
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Smith, Mark Anthony Shawn 1968. "Formal verification of TCP and T/TCP." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42779.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
Includes bibliographical references (p. 421-424).
by Mark Anthony Shawn Smith.
Ph.D.
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Jeacle, Karl. "TCP-XM." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613731.

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Núñez, Mori Oscar. "TCP HolyWood." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2005. http://hdl.handle.net/10183/5710.

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Apresentamos um novo Protocolo de Controle de Transporte fim-a-fim, implementado somente do lado do transmissor, chamado TCP HolyWood ou, abreviadamente, TCP-HW. Em um ambiente de rede cabeada simulada, TCP HolyWood supera em vazão media três dos mais importantes protocolos TCPs já elaborados. Estamos falando de TCP Reno, TCP Westwood, e TCP Vegas; e em variação de retardo media ao TCP Reno bem como ao TCP Vegas. Alem disso, de acordo com o índice de Jain, nossa proposta e tão imparcial quanto o padrão, TCP Reno.
We introduce a new end-to-end, sender side Transport Control Protocol called TCP HolyWood or in short TCP-HW. In a simulated wired environment, TCP HolyWood outperforms in average throughput, three of the more important TCP protocols ever made, we are talking about TCP Reno, TCP Westwood, and TCP Vegas; and in average jitter to TCP Reno and TCP Vegas too. In addition, according to Jain’s index, our proposal is as fair as TCP Reno, the Standard.
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Books on the topic "TCPO"

1

India. Town and Country Planning Organisation. TCPO: Retrospect & prospect. [New Delhi]: Town and Country Planning Organisation, Ministry of Urban Development and Poverty Alleviation, 2001.

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Bob, Willsey, ed. TCP/IP. Paris: CampusPress France, 1999.

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Swedish Central Organisation of salaried employers. Presenting TCO. Stockholm: Swedish Central Organisation of salaried employers., 1985.

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TCP/IP. New York: McGraw-Hill, 2001.

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TCP/IP. Indianapolis, Ind: New Riders, 1998.

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TCP/IP. New York: McGraw-Hill, 1999.

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Wada, Michiharu, Peter Schury, and Yuichi Ichikawa, eds. TCP 2014. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61588-2.

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Dilling, J., M. Comyn, J. Thompson, and G. Gwinner, eds. TCP 2006. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-73466-6.

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Jokinen, Ari, Tommi Eronen, Anu Kankainen, and Juha Äystö, eds. TCP 2010. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2588-1.

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Yi, Man-jae. Mak tcho naen tchinppang. So ul-si: Durano, 1990.

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Book chapters on the topic "TCPO"

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Smith, Sean W. "TCPA/TCG." In Trusted Computing Platforms: Design and Applications, 173–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-662-41015-8_10.

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Kuhlmann, Dirk. "On TCPA." In Financial Cryptography, 255–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-45126-6_19.

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Nagel, Christian, Ajit Mungale, Vinod Kumar, Nauman Laghari, Andrew Krowczyk, Tim Parker, S. Srinivasa Sivakumar, and Alexandru Serban. "TCP." In Pro .NET 1.1 Network Programming, 213–61. Berkeley, CA: Apress, 2004. http://dx.doi.org/10.1007/978-1-4302-0660-6_7.

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Gooch, Jan W. "TCP." In Encyclopedic Dictionary of Polymers, 731. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_11582.

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Rhodes, Brandon, and John Goerzen. "TCP." In Foundations of Python Network Programming, 39–56. Berkeley, CA: Apress, 2014. http://dx.doi.org/10.1007/978-1-4302-5855-1_3.

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Hakala, J., and J. Rissanen. "Nuclear structure studies of neutron-rich fission fragments performed at JYFLTRAP." In TCP 2010, 201–9. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2588-1_21.

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Drake, G. W. F., and Z. C. Yan. "Studies of light halo nuclei by the isotope shift method." In TCP 2006, 141–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-73466-6_18.

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Schwarz, S., C. Bachelet, M. Block, G. Bollen, D. Davies, M. Facina, C. M. Folden, et al. "The LEBIT facility at MSU." In TCP 2006, 269–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-73466-6_34.

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Angelescu, Carmen, and Guenter Werth. "A Penning trap with radial magnetic field." In TCP 2006, 445–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-73466-6_56.

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Jungmann, Klaus Peter. "Fundamental interactions." In TCP 2006, 5–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-73466-6_1.

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Conference papers on the topic "TCPO"

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Wright, Leigh P., Marina Makhratchev, Amy Yarbrough, Mohamed Elmandjra, and Jian-min Mao. "Comparison of TcPO 2 and StO 2 using the blood oxygen dissociation curve." In Biomedical Optics 2006, edited by Nikiforos Kollias, Haishan Zeng, Bernard Choi, Reza S. Malek, Brian J. Wong, Justus F. R. Ilgner, Eugene A. Trowers, et al. SPIE, 2006. http://dx.doi.org/10.1117/12.640174.

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CHAICHI, MJ, M. SHAMSIPUR, A. KARAMI, K. ALIZADEH, and O. NAZARI. "SOLVENT EFFECTS ON THE CHEMILUMINESCENCE OF TCPO IN PRESENCE OF 7-AMINO-4-TRIFLUOROMETHYLCOUMARIN." In Proceedings of the 13th International Symposium. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812702203_0032.

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SALERNO, DORIS, and JOAN-RAMON DABAN. "ANALYTICAL APPLICATIONS OF A NEW AQUEOUS PEROXYOXALATE CHEMILUMINESCENCE REAGENT.: COMPARISON WITH THE TYPICAL TCPO REACTION IN ORGANIC SOLVENT." In Bioluminescence and Chemiluminescence - Progress and Current Applications - 12th International Symposium on Bioluminescence (BL) and Chemiluminescence (CL). WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776624_0077.

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Oluwatope, Ayodeji, Biodun Obabire, G. Adesola Aderounmu, and Matthew Adigun. "End-to-End Performance Evaluation of Selected TCP Variants across a Hybrid Wireless Network." In InSITE 2006: Informing Science + IT Education Conference. Informing Science Institute, 2006. http://dx.doi.org/10.28945/3022.

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Reliable transport protocols such as TCP are tuned to perform well in traditional networks where packet losses occur mostly because of congestion. TCP is intended for use as a highly reliable end-to-end transport protocol for transporting applications such as World-Wide Web (WWW) between hosts in packet-switched computer communication networks. TCP was originally designed for wired links where the error rate is really low and actually assumed that packet losses are due to congestion in the network. However, the increasing popularity of wireless networks indicates that wireless links will play more important role in future internetworks but TCP performance in such networks suffers from significant throughput degradation and very high interactive delays. TCP responds to all losses by invoking congestion control and avoidance algorithms, resulting in degraded end-to-end performance in wireless and lossy systems. Thus, in a bid to show and determine the possibility of adapting TCP protocol for optimal performance on the wireless link, this paper reviews and models the behaviors of TCP variants with a view to evaluate the end-to-end performance analysis of TCP versions: TCP Reno, TCP SACK and TCP Westwood (TCPW), which are designed to improve the performance of TCP in lossy networks. A wireless network model was developed using NS-2 network simulator which and the model was simulated. The results were analyzed in MATLAB 6.5 using throughput as a metric for comparison. The overall results indicate that TCP Westwood (TCPW) demonstrates better performance indices over other versions in a hybrid wireless network environment.
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Xia, H., C. Shi, J. Wang, X. Bao, H. Li, and G. Fu. "Effects of Thickness and Winding Angle of the Laminate on Internal Pressure Capacity of Thermoplastic Composite Pipes." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18046.

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Abstract Thermoplastic composite pipes (TCPs) are increasingly used to transport hydrocarbons and water in the oil and gas industry due to their superior properties including corrosion resistance, thermal insulation, light weight, etc. The cross-section of TCPs generally consists of three layers: inner liner, composite laminate, and outer jacket. Three layers are bonded together and form a solid-wall construction. Inner liner and outer jacket made of thermoplastic polymer provide protective barriers for the laminate to against the inner fluid and outer environment. The laminate is constructed by an even number of helically wounded continuous fiber reinforced thermoplastic composite tapes. In this study, mechanical behaviors of a TCP under an internal pressure were investigated by using analytical and finite element analysis (FEA) methods. The analytical method which is based on the three-dimensional (3D) anisotropy elastic theory can take account of non-uniformly distributed stress and strain through the thickness of the pipe wall. FEA models were setup by using the software ABAQUS to predict the stress distribution of the pipe. 3D Tsai-Wu failure criterion was used to predict the maximum internal pressure of the pipe. Effects of some critical parameters, such as the winding angle of composite tapes and the number of reinforced plies, on the internal pressure capacity of TCPs were studied. Results obtained from the analytical and FEA methods were fairly agreed with each other, which showed that with the increasing of the number of reinforced plies the internal pressure capacity of a TCP gradually increases and approaches to an extreme value. In addition, the optimal winding angle which results the maximum internal pressure is not a constant value, instead, it varies with the increasing thickness of the laminate layer. This study provides useful tools and guidance for the design and analysis of TCPs, and is currently under validation through experiments.
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Wang, J., C. Shi, G. Fu, Z. Liu, X. Bao, and H. Li. "Numerical Evaluation on Lateral Impact Resistance of Thermoplastic Composite Pipes in Terms of Internal Pressure Capacity." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18047.

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Abstract Subsea pipelines are prone to be damaged by the falling objects from ships or offshore platforms, which may result in economic losses and pollution. The dimensions of dent were commonly used to evaluate the impact resistance of pipes made from carbon steel. Thermoplastic composite pipes (TCPs), due to their superior properties including corrosion resistance, thermal insulation, fast installation, etc., are increasingly used as the subsea pipelines. The TCP is made from thermoplastic resins and reinforced by continuous fibers. Because of the brittle nature of carbon fibers and glass fibers, the dimensions of dent are not suitable for assessment of impact resistance of a TCP. In the present work, a procedure was proposed using the internal pressure capacity as an indicator to evaluate the lateral impact resistance of a TCP. First, the internal pressure capacity of an intact TCP was evaluated. Second, a quasi-static simulation was conducted by applying a lateral compression force on the intact TCP using a rigid ball, until one of the composite plies in the reinforcement layer failed. The quasi-static simulation provided an initial estimate of the minimum energy that causes the start of damage of the TCP. Third, the impact simulations were performed by using a rigid ball hitting the TCP and, then, the internal pressure capacity of the damaged TCP was evaluated. Finally, the internal pressure capacity of the damaged pipe, compared with that of the intact pipe, was used as an indicator to evaluate the lateral impact resistance of the TCP. In this study, a glass-fiber reinforced polyethylene (PE) pipe of an inner diameter of 150 mm was modeled by ABAQUS to illustrate the procedure. A theoretical method was proposed to calculate the impact energy of a dropped object in a shallow water. The example studied in the present work showed that the modeled TCP was not strong enough to survive the lateral impact caused by the dropped object and should be buried to a certain depth beneath the seabed if used as a subsea pipeline.
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Jagani, Jakin, and Alexandrina Untaroiu. "A Study of TCPC-Stent Conjunction for Cavopulmonary Assist in Fontan Patients With Right Ventricular Dysfunction." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-68760.

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Mechanical circulatory support devices have gained significant importance in recent years as a viable therapeutic option to support paediatric population and children with single functional ventricle. The Fontan operation helps to reroute the deoxygenated blood to the lungs by bypassing the dysfunctional right ventricle. Total Cavopulmonary Connection (TCPC) is usually a method opted by the clinicians to connect the superior vena cava (SVC) and inferior vena cava (IVC) to the left and right pulmonary artery (LPA and RPA). However, the non-physiologic flow patterns created by the Fontan procedure leads to an increase in chances of platelet deposition and pressure loss which calls for heart transplantation to prevent early and late stage pathophysiology. This had led to modification of TCPC geometry to reduce the pressure and energy loss and thereby unload the single functional ventricle to ensure longer survival period. A study on mechanical circulatory device in conjunction with the modified TCPC geometry has seen little exposure and has opened new gates to develop a variety of state-of-art cavopulmonary assist devices. This study is focused on the selection of optimal TCPC to reduce energy loss and the effect of stent inside the modified TCPC on hemodynamics and flow structures. Four TCPC connections, developed for a particular age group of children, were studied for the velocity field, overall pressure and energy loss. In addition, the four TCPC connection geometries were also studied for distribution of hepatic blood from the IVC to both pulmonary arteries, and hence the lungs, to prevent development of any arteriovenous malformations. The entire stent assembly mounted inside the two best performing TCPC connections was examined for the hemodynamic effects using a series of 3D-CFD simulations. The curved-type connection for the TCPC proved to provide minimum pressure and energy loss along with reduced traces of vortex and recirculation. However, it was not efficient in terms of hepatic blood distribution. The flared geometry performed second best in terms of both minimum power loss and even hepatic blood distribution. There was a slight difference in power loss between the flared and the curved TCPC configuration with stent but the flared geometry had better hepatic blood distribution. This study demonstrated that a stent in conjunction with a TCPC leads to development of a helical flow pattern which provides better mixing of blood and even distribution to both the pulmonary arteries. The design of a stent with the best performing flared TCPC configuration can be optimized to reduce the amount of power loss and vortex generation and can be used to design similar scaled models for paediatric population of various age groups.
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8

Bhatt, Prahar M., Cheng Gong, Ariyan M. Kabir, Rishi K. Malhan, Brual C. Shah, and Satyandra K. Gupta. "Incorporating Tool Contact Considerations in Tool-Path Planning for Robotic Operations." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8522.

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Abstract Tool-Path planning is the foundation for automating many manufacturing processes. Robotic manipulators are increasingly being considered to automate tasks that require complex tool motions. Robotic manipulators provide extra degrees of freedom and are more flexible than traditional automation technologies. However, a tool-path needs to be planned and given to the manipulator trajectory generator as input. The traditional tool-path planning considers the tool to have one contact point, known as the Tool Center Point (TCP). This underutilizes the available flexibility of the manipulator. To make use of the manipulator’s flexibility, multiple contact points or multiple TCPs can be considered. These tool contact considerations make the tool path planning problem complex and computationally challenging. In this paper, we present a novel tool path planning algorithm. Our algorithm incorporates the multiple tool contact points consideration during tool-path planning in an efficient manner to generate a high-quality tool-path in a reasonable amount of run time. We evaluated our algorithm on four different test cases. The test cases include the parts with complex geometry and tools which can have surface area for establishing contacts with the part. In these test cases, a traditional single contact tool-path will not work due to geometric constraints, and multiple tool contacts make the problem challenging. Our algorithm was able to generate tool-paths for these four test cases successfully.
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9

Lu, Yifei, and Yan Li. "TS-TCP: Two-Stage Congestion Control Algorithm for High Concurrency TCPs in Data Center Networks." In 2019 28th International Conference on Computer Communication and Networks (ICCCN). IEEE, 2019. http://dx.doi.org/10.1109/icccn.2019.8847083.

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De Melo, Alexsander Andrade, and Uéverton dos Santos Souza. "Conexão de terminais com limitação de roteadores: complexidade e relação com fluxos e caminhos disjuntos." In XXXI Concurso de Teses e Dissertações da SBC. Sociedade Brasileira de Computação - SBC, 2018. http://dx.doi.org/10.5753/ctd.2018.3651.

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Investigamos a complexidade do PROBLEMA DE CONEXÃO DE TERMINAIS (TCP), um problema de projeto de redes diretamente relacionado a diversos problemas clássicos. Particularmente, analisamos a versão estrita do TCP, denotada por S-TCP, quando o parâmetro r é limitado por uma constante. Provamos que, para r 2 f0; 1g, o S-TCP é solucionável em tempo polinomial, o que contrasta com a complexidade do TCP, que é sabidamente NP-completo para todo r 0. Ademais, com o intuito de compreender melhor os casos em que r 2, estudamos algumas variantes do S-TCP e o relacionamos com problemas de fluxo em redes e de caminhos disjuntos. Provamos a NP-completude de um problema de fluxo integral, fechando uma questão em aberto por quarenta anos. Por fim, estabelecemos uma dicotomia poly vs. NP-c para o TCP e para o S-TCP com respeito ao grau máximo do grafo entrada e ao parâmetro.
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Reports on the topic "TCPO"

1

Braden, R. T/TCP -- TCP Extensions for Transactions Functional Specification. RFC Editor, July 1994. http://dx.doi.org/10.17487/rfc1644.

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2

Lebovitz, G., and E. Rescorla. Cryptographic Algorithms for the TCP Authentication Option (TCP-AO). RFC Editor, June 2010. http://dx.doi.org/10.17487/rfc5926.

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Tekesky, Robert. Transportable Collective Protection System (TCPS). Fort Belvoir, VA: Defense Technical Information Center, August 1990. http://dx.doi.org/10.21236/ada226135.

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DeKok, A. RADIUS over TCP. RFC Editor, May 2012. http://dx.doi.org/10.17487/rfc6613.

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Allman, M., V. Paxson, and E. Blanton. TCP Congestion Control. RFC Editor, September 2009. http://dx.doi.org/10.17487/rfc5681.

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Allman, M., V. Paxson, and W. Stevens. TCP Congestion Control. RFC Editor, April 1999. http://dx.doi.org/10.17487/rfc2581.

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Socolofsky, T. J., and C. J. Kale. TCP/IP tutorial. RFC Editor, January 1991. http://dx.doi.org/10.17487/rfc1180.

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Cheng, Y., J. Chu, S. Radhakrishnan, and A. Jain. TCP Fast Open. RFC Editor, December 2014. http://dx.doi.org/10.17487/rfc7413.

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Padlipsky, M. A. TCP-4 prime. RFC Editor, November 1985. http://dx.doi.org/10.17487/rfc0962.

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Zimmermann, A., and A. Hannemann. Making TCP More Robust to Long Connectivity Disruptions (TCP-LCD). RFC Editor, December 2010. http://dx.doi.org/10.17487/rfc6069.

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