6,016 research outputs found
Lyle Wright American fiction.
No full textVols. 1-3 based on three bibliographies by Lyle H. Wright: American fiction, 1774-1850; American fiction, 1851-1875; American fiction, 1876-1900. Vols. 4-5 "were assembled from the holdings of major American fiction collections, using the criteria employed by Wright." Cf. publisher's announcement.
Vols. 1-3 based on the Lyle H. Wright bibliography of American fiction.
Vols. 4-5 selected from the Library of Congress shelf list of American adult fiction. Cf. Publisher's announcement.
Accompanied by separately issued printed indexes.
Bib 491698
A beautiful bird without a name, or, A true Kentucky girl /
No full textCf. Wright, L.H. Amer. fiction, 1876-1900,Mode of access: Internet
Costs and Benefits of Prenatal Screening For Cystic Fibrosis
No full textNewly-developed genetic tests based on restriction fragment length polymorphisms (RFLPs) promise to facilitate the early detection of genetic diseases. Several such tests are now available for the prenatal detection of cystic fibrosis (CF), a common and costly disease. The tests for CF are currently limited to prenatal diagnosis in siblings of a victim of CF. Direct gene probe tests, which have yet to be developed for CF, would be applicable even in families that have not already borne a child with the disease. We examine the costs and benefits of prenatal testing for cystic fibrosis using existing RFLP-based tests and using a hypothetical direct gene probe test. We find that even an expensive RAPbased testing program produces substantial net benefits, because it is applied in pregnancies in which the risk of CF is 25%. If a direct gene probe test is applied in all pregnancies, it will need to be much less expensive to generate net benefits, and it will lead to the abortion of many normal fetuses unless it is highly specific. Because these new tests are likely to generate substantial savings in medical expenditures and to increase lifetime earnings, parents of CF-affected children may be subjected to strong pressures to participate in prenatal testing programs and to abort fetuses that test positive. It is imperative that the ethical dilemmas arising from this promising screening test be discussed openly before it becomes widely available.
On the equivalence of compactness and finiteness in topology, 1970
No full textA topological space X is compact-finite if and only if compactness and finiteness are equivalent. The most commonly used term for such a space is cf. CF-spaces may be determined in many ways. However, to show that a space is cf, it suffices to prove that every compact set is finite or that every infinite set is not compact. Numerous examples and related theorems of cf-spaces are presented
“The World Is What It Is”: Naipaul’s Quarrel With Conrad in<i>A Bend in the River</i>
No full textV. S. Naipaul's engagement with Joseph Conrad's Heart of Darkness (1899) in his 1979 novel, A Bend in the River, has elicited much comment, discussion often taking its cue from Naipaul's remark that Conrad "had been everywhere before me" ("Conrad's Darkness" 4). Naipaul does indeed traverse Conradian tropes and territory to create his dyspeptic vision of an Africa where all efforts to modernize and develop inevitably sink back into primeval chaos and "darkness." It is precisely this reliance on a mythicized Africa, packed with inflated generalization, that attracts the ire of postcolonial critics. Naipaul's vision of post-independent Africa remains substantially the Africa of Conrad (cf. Coetzee 5). There is irritated puzzlement and genuine anguish among contemporary Africanists about why Naipaul should recapitulate a Conradian approach to writing about Africa eighty years after the publication of Heart of Darkness
The influence of fiber-matrix adhesion on the linear viscoelastic creep behavior of CF/PPS composites
No full textThe influence of fiber-matrix adhesion on the linear viscoelastic creep behavior of as received and surface modified carbon fiber (AR-CF and SM-CF, respectively) reinforced polyphenylene sulfide (PPS) composite materials was investigated. Short-term tensile creep tests were performed on ±45° specimens under four different isothermal condition; 70, 80, 90 and 100°C. As a preliminary step to obtain the time-temperature master curve, as well as to characterize the changes in matrix dominated properties over storage time, physical aging effects were evaluated on both systems using the short-term test method established by Struik. The results showed that the surface treatment carried out in the SM-CF improved fiber-matrix adhesion, enhancing the mechanical performance of CF/PPS composites but with minor effects on the creep response. Increasing retardation times with physical aging was observed in all test conditions. Compared to temperature effects, physical aging showed to have a small contribution on the creep behavior of CF/PPS composites.Aerospace Structures & MaterialsAerospace Engineerin
On the post-impact fatigue behavior and theoretical life prediction of CF/PEEK-titanium hybrid laminates using an energy dissipation approach
No full textThis paper aims to illustrate the effect of the impact damage on fatigue behavior of CF/PEEK-titanium hybrid laminates. To achieve this end, a fatigue life model was proposed to predict the S–N curves of the laminates at various initial impact energy levels and stress ratios based on the energy dissipation approach. The energy dissipation behavior of the laminates during fatigue loading under different experimental conditions was analyzed through a large amount of post-impact fatigue tests, and the correlation between the initial impact damage and the total fatigue dissipation energy was determined. The full-field axial strain distribution of the titanium layer on the impacted side of the laminate was characterized in terms of initial impact energy level and maximum stress using digital image correlation, and then the post-impact fatigue failure mechanism of CF/PEEK-Ti hybrid laminates was summarized. Finally, the validity of the proposed model was verified by fatigue tests under other conditions of stress ratio and impact energy level. It is worth mentioning that the proposed model is also applicable to other types of FMLs, and can accurately predict the residual fatigue life of laminates after impact with only one set of S–N curve data.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Structural Integrity & Composite
Comparative genomics of isolates of a pseudomonas aeruginosa epidemic strain associated with chronic lung infections of cystic fibrosis patients
No full textPseudomonas aeruginosa is the main cause of fatal chronic lung infections among individuals suffering from cystic fibrosis (CF). During the past 15 years, particularly aggressive strains transmitted among CF patients have been identified, initially in Europe and more recently in Canada. The aim of this study was to generate high-quality genome sequences for 7 isolates of the Liverpool epidemic strain (LES) from the United Kingdom and Canada representing different virulence characteristics in order to: (1) associate comparative genomics results with virulence factor variability and (2) identify genomic and/or phenotypic divergence between the two geographical locations. We performed phenotypic characterization of pyoverdine, pyocyanin, motility, biofilm formation, and proteolytic activity. We also assessed the degree of virulence using the Dictyostelium discoideum amoeba model. Comparative genomics analysis revealed at least one large deletion (40-50 kb) in 6 out of the 7 isolates compared to the reference genome of LESB58. These deletions correspond to prophages, which are known to increase the competitiveness of LESB58 in chronic lung infection. We also identified 308 non-synonymous polymorphisms, of which 28 were associated with virulence determinants and 52 with regulatory proteins. At the phenotypic level, isolates showed extensive variability in production of pyocyanin, pyoverdine, proteases and biofilm as well as in swimming motility, while being predominantly avirulent in the amoeba model. Isolates from the two continents were phylogenetically and phenotypically undistinguishable. Most regulatory mutations were isolate-specific and 29% of them were predicted to have high functional impact. Therefore, polymorphism in regulatory genes is likely to be an important basis for phenotypic diversity among LES isolates, which in turn might contribute to this strain's adaptability to varying conditions in the CF lung
The New Testament of Our Lord and Saviour Jesus Christ, translated into the Choctaw language. Pin chitokaka pi okchalinchi Chisvs Klaist in testament himona, chahta anumpa atoshowa hoke.
No full text4th ed.Translated by A. Wright and C. Byington. cf. Brit. and for. Bible soc. lib. Historical catalogue of printed Bibles, v. 2, p. 259.Mode of access: Internet
Novel thermomechanical characterization for shrinkage evolution of unidirectional semi-crystalline thermoplastic prepregs (PPS/CF) in melt, rubbery and glassy states
No full textShrinkages, distortions and high residual stresses in the thermoplastic composite parts are induced due to high processing temperature, anisotropy, and fiber–matrix shrinkage mismatch. In this paper the shrinkages have been investigated experimentally and modeled by thermo-mechanical constitutive equations for PolyPhenylene Sulfide (PPS) and the unidirectional Carbon Fiber (PPS/CF) composite prepreg. The thermal shrinkage and the crystallization shrinkage were retrieved from Thermal Mechanical Analysis and compared to a Pressure specific volume Temperature diagram. To describe the crystallization shrinkage in the cooling process accurately, the crystallization kinetics of PPS was evaluated using Differential Scanning Calorimetry. The temperature-dependent elastic modulus was measured by a shear rheometer to formulate a new constitutive model. The mathematical model for shrinkage was validated by a press consolidated [0]12 laminate and unbalanced laminates in four lay-ups. The thermo-mechanical model results presented here provide significant rules for the thermomechanical and shrinkage predictions for the industrial applications of thermoplastic composite.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Aerospace Manufacturing Technologie
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