100,770 research outputs found
Nematic-isotropic phase transition in diblock fused-sphere chain fluids
No full textA density-functional theory for the isotropic-nematic phase transition in fluids of rigid or semiflexible fused hard-sphere chains, developed previously by the authors, is extended to diblock chains each consisting of both a rigid and a flexible part. The theory is compared with recent Monte Carlo simulation results of McBride The theoretical results for the variation of pressure and nematic order parameter with density agree well with the simulation data over density ranges where the simulations find isotropic and nematic phases.PT: J; CR: BOUBLIK T, 1974, MOL PHYS, V27, P1415 BOUBLIK T, 1975, J CHEM PHYS, V63, P4084 BOUBLIK T, 1981, MOL PHYS, V44, P1369 BOUBLIK T, 1989, MOL PHYS, V68, P191 COTTER MA, 1977, J CHEM PHYS, V66, P1098 COTTER MA, 1978, PHYS REV A, V18, P2669 FORSMAN J, 2003, J CHEM PHYS, V119, P1889 FYNEWEVER H, 1998, J CHEM PHYS, V108, P1636 HONNELL KG, 1989, J CHEM PHYS, V90, P1841 JAFFER KM, 1999, J CHEM PHYS, V110, P11630 JAFFER KM, 2001, J CHEM PHYS, V114, P3314 KHOKHLOV AR, 1981, PHYSICA A, V108, P546 KHOKHLOV AR, 1982, PHYSICA A, V112, P605 MCBRIDE C, 2001, PHYS REV E 1, V64 MCBRIDE C, 2002, J CHEM PHYS, V117, P10370 MEHTA SD, 1996, J PHYS CHEM-US, V100, P10408 MULLER M, 2003, J CHEM PHYS, V118, P2929 SATO T, 1996, ADV POLYM SCI, V126, P85 TIAN P, 2001, J CHEM PHYS, V115, P9055 VARGA S, 2000, MOL PHYS, V98, P693 VEGA C, 1994, J CHEM PHYS, V100, P6727 WERTHEIM MS, 1987, J CHEM PHYS, V87, P7323 WHITTLE M, 1991, MOL PHYS, V72, P247 WILLIAMSON DC, 1995, MOL PHYS, V86, P819 WILLIAMSON DC, 1998, J CHEM PHYS, V108, P10294 YETHIRAJ A, 1998, MOL PHYS, V93, P693 ZHOU YQ, 1995, J CHEM PHYS, V103, P2688; NR: 27; TC: 3; J9: PHYS REV E; PN: Part 1; PG: 4; GA: 835RHSource type: Electronic(1
Melissa Jaffer and Tony Llewellyn-Jones
No full textNational Graduate Summer - 'Life After George' Production, Conferring Ceremonies, Seven Days of Creation Mural, etc. - Melissa Jaffer, Tony Llewellyn-Jones, Nelson Mandela, John Hooper, Thalia Wat, Sawacon Perapun, Christine James, Kristen Cornwell, Lindsay Cook, T. A. Hall, Manning Clark, Paul Keating, Rob Brian, Prof. I. O. Orububye, Prapon Wilairat, Dr. Christopher Leonard, Howard Liu, Dr. Majid Makhdoum, Dr. Karl Franklin, Mr. Stuart Hamilton, Dr. Graeme Hassau, Alistair Urquhart, Dr. Deklin, Minda C. Mangabat & other
The nematic-isotropic phase transition in semiflexible fused hard-sphere chain fluids
No full textA density-functional theory of the isotropic-nematic phase transition in both rigid and semiflexible hard-sphere chain fluids is described. The theory is based on an exact analytical evaluation of the excluded volume and second virial coefficient B-2 for rigid chain molecules, which demonstrates that B-2 in these cases is equivalent to that of a binary mixture of hard spheres and hard diatomic molecules. It is assumed that the same binary-mixture representation applies to semiflexible chains, while scaled particle theory is used to obtain the properties of the fluid at arbitrary densities. The results of the theory are in very good agreement with Monte Carlo (MC) simulation data for rigid tangent hard-sphere chains, but in lesser agreement with available MC studies of rigid fused hard-sphere chains. We find that there is reasonable agreement between the theory and MC data for semiflexible tangent chains, which improves with increasing chain length. The behavior predicted by the theory for semiflexible chains is contrasted with that given by the Khokhlov and Semenov theory of nematic ordering of wormlike polymer chains. (C) 2001 American Institute of Physics.PT: J; CR: BOUBLIK T, 1974, MOL PHYS, V27, P1415 BOUBLIK T, 1975, J CHEM PHYS, V63, P4084 BOUBLIK T, 1977, CHEM PHYS LETT, V46, P315 BOUBLIK T, 1981, MOL PHYS, V44, P1369 BOUBLIK T, 1989, MOL PHYS, V68, P191 BOUBLIK T, 1990, J CHEM PHYS, V93, P730 CARNAHAN NF, 1969, J CHEM PHYS, V51, P635 CHAPMAN WG, 1988, MOL PHYS, V65, P1057 CHEN ZY, 1993, MACROMOLECULES, V26, P3419 COSTA LA, 1995, J CHEM PHYS, V102, P6212 COTTER MA, 1977, J CHEM PHYS, V66, P1098 COTTER MA, 1978, PHYS REV A, V18, P2669 DIJKSTRA M, 1995, PHYS REV E A, V51, P5891 ESCOBEDO FA, 1997, J CHEM PHYS, V106, P9858 FYNEWEVER H, 1998, J CHEM PHYS, V108, P1636 GAO J, 1989, J CHEM PHYS, V91, P3168 HONNELL KG, 1989, J CHEM PHYS, V90, P1841 JAFFER KM, 1999, J CHEM PHYS, V110, P11630 KHOKHLOV AR, 1981, PHYSICA A, V108, P546 KHOKHLOV AR, 1982, PHYSICA A, V112, P605 LEE SD, 1987, J CHEM PHYS, V87, P4972 MEHTA SD, 1996, J PHYS CHEM-US, V100, P10408 MULLER M, 1998, PHYS REV E, V57, P6973 ONSAGER L, 1949, ANN NY ACAD SCI, V51, P627 PARSONS JD, 1979, PHYS REV A, V19, P1225 PATRA CN, 2000, J CHEM PHYS, V112, P1579 SEN S, 1994, J CHEM PHYS, V101, P9010 VARGA S, 2000, MOL PHYS, V98, P693 VEGA C, 1994, J CHEM PHYS, V100, P6727 WALSH JM, 1990, J PHYS CHEM-US, V94, P5115 WERTHEIM MS, 1987, J CHEM PHYS, V87, P7323 WHITTLE M, 1991, MOL PHYS, V72, P247 WILLIAMSON DC, 1995, MOL PHYS, V86, P819 WILLIAMSON DC, 1998, J CHEM PHYS, V108, P10294 YETHIRAJ A, 1992, MACROMOLECULES, V25, P3979 YETHIRAJ A, 1995, J CHEM PHYS, V102, P5499 YETHIRAJ A, 1995, J CHEM PHYS, V102, P6874 YETHIRAJ A, 1998, MOL PHYS, V93, P693 ZHOU YQ, 1995, J CHEM PHYS, V103, P2688; NR: 39; TC: 8; J9: J CHEM PHYS; PG: 11; GA: 397THSource type: Electronic(1
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
The nematic-isotropic phase transition in linear fused hard-sphere chain fluids
No full textWe present a modification of the generalized Flory dimer theory to investigate the nematic (N) to isotropic (I) phase transition in chain fluids. We focus on rigid linear fused hard-sphere (LFHS) chain molecules in this study. A generalized density functional theory is developed, which involves an angular weighting of the dimer reference fluid as suggested by decoupling theory, to accommodate nematic ordering in the system. A key ingredient of this theory is the calculation of the exact excluded volume for a pair of molecules in an arbitrary relative orientation, which extends the recent work by Williamson and Jackson for linear tangent hard-sphere chain molecules to the case of linear fused hard-sphere chains with arbitrary intramolecular bondlength. The present results for the N-I transition are compared with previous theories and with computer simulations. In comparison with previous studies, the results show much better agreement with simulations for both the coexistence densities and the nematic order parameter at the transition. (C) 1999 American Institute of Physics. [S0021-9606(99)51023-4].PT: J; CR: BOLHUIS P, 1997, J CHEM PHYS, V106, P666 BOUBLIK T, 1977, CHEM PHYS LETT, V46, P315 BOUBLIK T, 1989, MOL PHYS, V68, P191 CARNAHAN NF, 1969, J CHEM PHYS, V51, P635 CHAMOUX A, 1998, MOL PHYS, V93, P649 CHANDLER D, 1976, J CHEM PHYS, V65, P2925 CHANG J, 1994, CHEM ENG SCI, V49, P2777 CHAPMAN WG, 1988, MOL PHYS, V65, P1057 CHIEW YC, 1990, MOL PHYS, V70, P129 COSTA LA, 1995, J CHEM PHYS, V102, P6212 CURRO JG, 1987, MACROMOLECULES, V20, P1928 FYNEWEVER H, 1998, J CHEM PHYS, V108, P1636 HONNELL KG, 1989, J CHEM PHYS, V90, P1841 JAFFER KM, 1999, THESIS U GUELPH KIERLIK E, 1992, J CHEM PHYS, V97, P9222 KIERLIK E, 1993, J CHEM PHYS, V99, P3950 LEE SD, 1987, J CHEM PHYS, V87, P4972 MEHTA SD, 1996, J PHYS CHEM-US, V100, P10408 ONSAGER L, 1949, ANN NY ACAD SCI, V51, P627 PADILLA P, 1997, J CHEM PHYS, V106, P10299 PARSONS JD, 1979, PHYS REV A, V19, P1225 PRATT LR, 1977, J CHEM PHYS, V66, P147 SCHWEIZER KS, 1988, MACROMOLECULES, V21, P3070 SEN S, 1994, J CHEM PHYS, V101, P9010 SOMOZA AM, 1989, J CHEM PHYS, V91, P517 STELL G, 1964, EQUILIBRIUM THEORY C TILDESLEY DJ, 1980, MOL PHYS, V41, P85 VEGA C, 1994, J CHEM PHYS, V100, P6727 WERTHEIM MS, 1987, J CHEM PHYS, V87, P7323 WHITTLE M, 1991, MOL PHYS, V72, P247 WILLIAMSON DC, 1995, MOL PHYS, V86, P819 WILLIAMSON DC, 1998, J CHEM PHYS, V108, P10294 WOODWARD CE, 1994, J CHEM PHYS, V100, P3181 YETHIRAJ A, 1993, J CHEM PHYS, V98, P1635 YETHIRAJ A, 1995, J CHEM PHYS, V102, P5499 YETHIRAJ A, 1998, MOL PHYS, V93, P693 ZHOU YQ, 1995, J CHEM PHYS, V103, P2688; NR: 37; TC: 15; J9: J CHEM PHYS; PG: 13; GA: 200CHSource type: Electronic(1
Digital strategy in airports
No full textAs airports continue to become more ‘customer-centric’ their digital customer-facing technologies are increasingly embedded within the passenger journey. This study takes a customer-centric view of airport digital technology by exploring the ways that digital technologies are being applied within airports to improve passenger perspectives of service quality during their journey. The literature review develops a framework encompassing the themes of airport service quality (function, interaction and diversion) and digital strategy. This framework has been applied to six airports exhibiting high service quality. Currently, the findings suggest that the improvement of customer function involves the use of automated and self-service technologies providing passengers greater efficiency and effectiveness during processing points. Additionally, technology to improve experience during wait times may entail either aesthetic qualities, or provide some form of productivity to passengers. Alternatively, customer interaction is influenced by digital technology through constant passenger engagement during their journey. As the research nears completion, the influence of these themes on the framework will become more apparent
Handwritten biographical information on Paulina T. McClung Merritt
No full textA handwritten biography of Paulina T. McClung Merritt by an unknown author, 1892.
Heterogeneous and tissue-specific regulation of effector T cell responses by IFN-gamma during Plasmodium berghei ANKA infection.
No full textIFN-γ and T cells are both required for the development of experimental cerebral malaria during Plasmodium berghei ANKA infection. Surprisingly, however, the role of IFN-γ in shaping the effector CD4(+) and CD8(+) T cell response during this infection has not been examined in detail. To address this, we have compared the effector T cell responses in wild-type and IFN-γ(-/-) mice during P. berghei ANKA infection. The expansion of splenic CD4(+) and CD8(+) T cells during P. berghei ANKA infection was unaffected by the absence of IFN-γ, but the contraction phase of the T cell response was significantly attenuated. Splenic T cell activation and effector function were essentially normal in IFN-γ(-/-) mice; however, the migration to, and accumulation of, effector CD4(+) and CD8(+) T cells in the lung, liver, and brain was altered in IFN-γ(-/-) mice. Interestingly, activation and accumulation of T cells in various nonlymphoid organs was differently affected by lack of IFN-γ, suggesting that IFN-γ influences T cell effector function to varying levels in different anatomical locations. Importantly, control of splenic T cell numbers during P. berghei ANKA infection depended on active IFN-γ-dependent environmental signals--leading to T cell apoptosis--rather than upon intrinsic alterations in T cell programming. To our knowledge, this is the first study to fully investigate the role of IFN-γ in modulating T cell function during P. berghei ANKA infection and reveals that IFN-γ is required for efficient contraction of the pool of activated T cells
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Pelevin’s Trinity in the novel “t”: author – protagonist – reader
No full textThe article attempts to interpret Pelevin's artistic strategy in the novel "T" by exploring its subject organization and addressing the key problems of the author, the protagonist, and the reader as they are seen by the researcher. The article analyzes the peculiarities of constructing the narrative reality in the novel "T", and goes on to discuss Pelevin's philosophic models of the development of the humankind, and the emergence of his new anthropology
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