58,922 research outputs found
First measurement of the CKM angle ϕ3 with B±→ D(π+π−π0) K± decays
No full textA bstract We present the first model-independent measurement of the CKM unitarity triangle angle ϕ 3 using B ± → D ( K S 0 π + π − π 0 ) K ± decays, where D indicates either a D 0 or D ¯ 0 meson. Measurements of the strong-phase difference of the D → K S 0 π + π − π 0 amplitude obtained from CLEO-c data are used as input. This analysis is based on the full Belle data set of 772 × 10 6 B B ¯ events collected at the Υ(4 S ) resonance. We obtain ϕ 3 = ( 5.7 − 8.8 + 10.2 ± 3 . 5 ± 5 . 7) ° and the suppressed amplitude ratio r B = 0 . 323 ± 0 . 147 ± 0 . 023 ± 0 . 051. Here the first uncertainty is statistical, the second is the experimental systematic, and the third is due to the precision of the strong-phase parameters measured from CLEO-c data. The 95% confidence interval on ϕ 3 is ( − 29 . 7 , 109 . 5) ° , which is consistent with the current world average
Writing from the shadowlands: how cross-cultural literature negotiates the legacy of Edward Said
Full text linkThis thesis examines the impact of Edward Said's influential work Orientalism and its legacy in respect of contemporary reading and writing across cultures. It also questions the legitimacy of Said's retrospective stereotyping of early examples of cross-cultural representation in literature as uncompromisingly 'orientalist'.
It is well known that the release of Edward Said's Orientalism in 1978 was responsible for the rise of a range of cultural and critical theories from multiculturalism to postcolonialism. It was a study that not only polarized critics and forced scholars to re-examine orientalist archives, but persuaded creative writers to re-think their ethnographic positions when it came to the literary representations of cultures other than their own. Without detracting from the enormous impact of Said, this thesis isolates gaps and silences in Said that need correcting. Furthermore, there is an element of intransigence, an uncompromising refusal to fine-tune what is essentially a binary discourse of the West and its other in Said's work, that encourages the continued interrogation of power relations but which, because of its very boldness, paradoxically disallows the extent to which the conflict of cultures indeed produced new, hybrid social and cultural formations.
In an attempt to challenge the severity of Said's claim that 'every European, in what he could say about the Orient, was consequently a racist, an imperialist, and almost totally ethnocentric', the thesis examines a number of different discursive contexts in which such a presumption is challenged. Thus while the second chapter discusses the 'traditional' profession-based orientalism of nineteenth-century E. G. Browne, the third considers the anti-imperialism of colonial administrator Leonard Woolf. The fourth chapter provides a reflection on the difficulties of diasporic 'orientalism' through the works of Michael Ondaatje while chapter five demonstrates the effects of the dialogism used by Amitav Ghosh as a defence against 'orientalism'. The thesis concludes with an examination of contemporary writing by Andrea Levy that appositely illustrates the legacy of Said's influence.
While the restrictive parameters of Said's work make it difficult to mount a thorough-going critique of Said, this thesis shows that, indeed, it is within the restraints of these parameters and in the very discourse that Said employs that he traps himself. This study claims that even Said is susceptible to 'orientalist' criticism in that he is as much an 'orientalist' as those at whom he directs his polemic
Depolarization and decreased surface expression of K+ channels contribute to NSAID-inhibition of intestinal restitution
No full textNon-steroidal anti-inflammatory drugs (NSAIDs) contribute to gastrointestinal ulcer formation by inhibiting epithelial cell migration and mucosal restitution; however, the drug-affected signaling pathways are poorly defined. We investigated whether NSAID inhibition of intestinal epithelial migration is associated with depletion of intracellular polyamines, depolarization of membrane potential (Em) and altered surface expression of K+ channels. Epithelial cell migration in response to the wounding of confluent IEC-6 and IEC-Cdx2 monolayers was reduced by indomethacin (100μM), phenylbutazone (100μM) and NS-398 (100μM) but not by SC-560 (1μM). NSAID-inhibition of intestinal cell migration was not associated with depletion of intracellular polyamines. Treatment of IEC-6 and IEC-Cdx2 cells with indomethacin, phenylbutazone and NS-398 induced significant depolarization of Em, whereas treatment with SC-560 had no effect on Em. The Em of IEC-Cdx2 cells was: −38.5±1.8mV under control conditions; −35.9±1.6mV after treatment with SC-560; −18.8±1.2mV after treatment with indomethacin; and −23.7±1.4mV after treatment with NS-398. Whereas SC-560 had no significant effects on the total cellular expression of Kv1.4 channel protein, indomethacin and NS-398 decreased not only the total cellular expression of Kv1.4, but also the cell surface expression of both Kv1.4 and Kv1.6 channel subunits in IEC-Cdx2. Both Kv1.4 and Kv1.6 channel proteins were immunoprecipitated by Kv1.4 antibody from IEC-Cdx2 lysates, indicating that these subunits co-assemble to form heteromeric Kv channels. These results suggest that NSAID inhibition of epithelial cell migration is independent of polyamine-depletion, and is associated with depolarization of Em and decreased surface expression of heteromeric Kv1 channels.ID: S0006295207001931; M3: Article; Accession Number: S0006295207001931; Author: L.C. Freeman (b); Author: D.F. Narvaez (a); Author: A. McCoy (a); Author: F.B. von Stein (c); Author: S. Young (b); Author: K. Silver (a); Author: S. Ganta (b); Author: D. Koch (b); Author: R. Hunter (b); Author: R.F. Gilmour (c); Author: J.D. Lillich (a, ⁎); Affiliation: Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Anatomy and Physiology, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, United States; Keyword: Non-steroidal anti-inflammatory drugs; Keyword: Intestinal epithelial cells; Keyword: Membrane potential; Keyword: Potassium channels; Number of Pages: 12; Language: English;Source type: Electronic(1)http://search.ebscohost.com/login.aspx?direct=true&db=edselp&AN=S0006295207001931&site=eds-live&scope=sit
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
ChemInform Abstract: Bi- and Tricyclic Penta- and Hexacoordinated Phosphoranes with Varying Ring Sizes: Synthesis, Structures, and Reactivity.
No full textMeasurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
Full text linkThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
On the distribution of -integers in Piatetski-Shapiro sequences
Full text linksummary:A natural number is said to be a -integer if , where and is not divisible by the th power of any prime. We study the distribution of such -integers in the Piatetski-Shapiro sequence with . As a corollary, we also obtain similar results for semi--free integers
Half of visible and half of recurrent visible hematuria cases have underlying pathology: prospective large cohort study with long-term followup
No full textPurpose: visible hematuria has a cancer yield of up to 24.2%. A large proportion of cases will have no etiology. In this study we determined the incidence of pathology (benign and malignant) in patients with visible hematuria and those with persistent and recurrent visible hematuria, and evaluated the policy for investigations.Materials and methods: data were prospectively collected for 1,804 patients with visible hematuria at a United Kingdom teaching hospital from January 1999 to September 2007. In October 2010 the comprehensive hospital electronic database was checked for every individual patient to ensure no urological pathology was missed. All patients underwent standard hematuria investigations, including renal tract ultrasound and excretory urography or contrast enhanced computer tomography urogram, flexible cystoscopy and urine cytology.Results: the male-to-female ratio was 4.8:1. Median age ± SD was 67 ± 17.0 years (range 21 to 109). Median followup was 6.6 ± 2.5 years (range 1.5 to 11.6). No urological pathology was found in 965 (53.5%) patients. Malignant urological disease was found in 386 (21.4%) patients, of whom 329 had bladder tumors. There were 32 patients with persistent visible hematuria and no malignancy. Repeat investigation was performed in 69 patients reporting recurrence. Of these patients 35 received a significant urological diagnosis, including 12 (17.4%) urological malignancies, while 34 (49.3%) still had no diagnosis. Limitations include the possibility of missing pathology.Conclusions: almost 50% of patients presenting with visible hematuria will have a diagnosis. Therefore, all cases of visible hematuria require full standard investigations. Patients with no diagnosis can be discharged from followup. Recurrent visible hematuria after full initial negative findings requires repeat full standard investigations because 11.6% will have malignant pathology.</p
Correction to: Bican, R., Christensen, C., Fallieras, K., Sagester, G., O’Rourke, S., Byars, M., & Tanner, K. (2021). Rapid Implementation of Telerehabilitation for Pediatric Patients During COVID-19
Full text linkCorrection to: Bican, R., Christensen, C., Fallieras, K., Sagester, G., O’Rourke, S., Byars, M., & Tanner, K. (2021). Rapid Implementation of Telerehabilitation for Pediatric Patients During COVID-19. International Journal of Telerehabilitation, 13(1). https://doi.org/10.5195/ijt.2021.6371
The affiliation for each author was incorrectly stated as: Physical Medicine & Rehabilitation, Children’s Minnesota, Minneapolis, Minnesota, USA
The correct affiliation for each author is: Clinical Therapies, Nationwide Children’s Hospital, Columbus, Ohio, USA
The metadata for the original article has been corrected
Self-excited and hidden attractors in a novel chaotic system with complicated multistability
No full textIn this paper, a new 3D chaotic system with trigonometric function term as a nonlinear controller
is proposed. Depending on the nonlinear controller and the value of the parameters, the proposed system
exhibits self-excited attractor with an unstable equilibrium, and hidden attractor with no equilibrium
or a stable equilibrium. In addition, the unusual and striking dynamic behavior of the coexistence of
self-excited chaotic with periodic attractors, two self-excited chaotic attractors with periodic attractor,
three periodic attractors, hidden chaotic with point attractors, two hidden chaotic attractors, and four
hidden chaotic attractors are explored by selecting appropriate initial values. Consequently, the proposed
system has high sensitivity to its initial values and parameters, hence it can be applied in chaos-based
cryptographic applications. Thus, the non-periodicity of coexisting attractors of the system is investigated
through Lyapunov exponents and Sample Entropy. To demonstrate the performance of the system in real
applications, we construct a pseudo-random number generator (PRNG) based on the hidden attractor
case. The randomness test results show that the generated PRNG pass all the statistical tests
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