The study examined the conditions under which lay people and health professionals living in Chile... more The study examined the conditions under which lay people and health professionals living in Chile find it acceptable for a physician to break confidentiality to protect the wife of a patient with a sexually transmitted disease (STD). One hundred sixty-nine lay persons, 10 physicians, 17 psychologists, and 11 paramedical professionals indicated the acceptability of breaking confidentiality in 48 scenarios. The scenarios were all possible combinations of five factors: disease severity (severe, lethal); time taken to discuss this with the patient (little time, much time); patient’s intent to inform his spouse about the disease (none, one of these days, immediately); patient’s intent to adopt protective behaviors (no intent, intent); and physician’s decision to consult an STD expert (yes, no), 2 x 2 x 3 x 2 x 2. The study also compared Chilean and French views, using data gathered previously in France. A cluster analysis conducted on the overall set of raw data revealed groups of partic...
New experimental data and theory are reported for obtaining three types of rate parameters contro... more New experimental data and theory are reported for obtaining three types of rate parameters controlling kinetics and molecular weight distributions in free-radical polymerizations. (1) (a) Propagation rate coefficients (kp) for butyl aery late are found using pulsed-laser polymerization, with the novel variant of carrying out the procedure at very low temperatures (−10 to −40 °C); this obviates some problems hitherto found with the technique, (b) A means of calculating kp from first principles from transition state theory is given, using accurate quantum mechanical computation of the transition state properties. These calculations give quantitative accord with experiment for ethylene, and reveal that the magnitude of the frequency factor for propagation is dominated by three hindered rotors in the transition state. Since these rotations are influenced by the penultimate unit, this suggests that significant penultimate unit effects are likely in copolymerizations. The effect of these rotations also explains the observed effect of deuteration on kp. (2) A new technique for measuring the transfer rate coefficient (k tr) is presented: initiation by pulsed laser, whence k tr can be obtained from the high molecular weight slope of a plot of ln(number molecular weight distribution) against molecular weight. The method, which can be employed even when extensive termination is taking place, is tested with transfer from MMA to triethylamine. (3) The rate coefficient for termination can be successfully modelled from a knowledge of the diffusion coefficients for oligomeric species as functions of the degree of polymerization and the polymer fraction. New PFG NMR diffusion data for a series of model compounds in polystyrene/benzene give results for this dependence which are in accord with a semiempirical scaling law suggested previously [Piton MC, Gilbert RG, Chapman BE, Kuchel PW (1993) Macromolecules 26: 4472], suggesting that this scaling should be a useful basis for predicting termination rate coefficients.
Page 1. Chapter 7 Termination Rate Coefficients from Molecular Weight Distributions Paul A. Clay,... more Page 1. Chapter 7 Termination Rate Coefficients from Molecular Weight Distributions Paul A. Clay, David I. Christie, and Robert G. Gilbert Chemistry School, Sydney University, New South Wales 2006, Australia An extended ...
ACM Transactions on Management Information Systems, 2011
Trust plays an important role in many Information Systems (IS)-enabled situations. Most IS resear... more Trust plays an important role in many Information Systems (IS)-enabled situations. Most IS research employs trust as a measure of interpersonal or person-to-firm relations, such as trust in a Web vendor or a virtual team member. Although trust in other people is important, this article suggests that trust in the Information Technology (IT) itself also plays a role in shaping IT-related beliefs and behavior. To advance trust and technology research, this article presents a set of trust in technology construct definitions and measures. We also empirically examine these construct measures using tests of convergent, discriminant, and nomological validity. This study contributes to the literature by providing: (a) a framework that differentiates trust in technology from trust in people, (b) a theory-based set of definitions necessary for investigating different kinds of trust in technology, and (c) validated trust in technology measures useful to research and practice.
... A. Lyons, Jelica Hutovic, Mark C. Piton, † David I. Christie, Paul A. Clay, Bart G. Manders, ... more ... A. Lyons, Jelica Hutovic, Mark C. Piton, † David I. Christie, Paul A. Clay, Bart G. Manders, ‡ Scott H. Kable, and Robert G. Gilbert*. School of Chemistry, Sydney University, Sydney, NSW 2006, Australia. Macromolecules , 1996, 29 (6), pp 1918–1927. DOI: 10.1021/ma950747n. ...
GPC trace = weight distribution (a) GPC n ... I I:, ,:'It MALDI signal = number dist... more GPC trace = weight distribution (a) GPC n ... I I:, ,:'It MALDI signal = number distribution) ... It is particularly applicable to low molecular weights (ca. lo4), is an absolute method requiring no polymer molec-ular-weight calibration, and uses tiny quantities of sample (as low as ...
An experimental investigation focusing on the effect of dissipation on the evolution of the Benja... more An experimental investigation focusing on the effect of dissipation on the evolution of the Benjamin–Feir instability is reported. A series of wave trains with added sidebands, and varying initial steepness, perturbed amplitudes and frequencies, are physically generated in a long wave flume. The experimental results directly confirm the stabilization theory of Segur et al. (J. Fluid Mech., vol. 539, 2005, pp. 229–271), i.e. dissipation can stabilize the Benjamin–Feir instability. Furthermore, the experiments reveal that the effect of dissipation on modulational instability depends strongly on the perturbation frequency. It is found that the effect of dissipation on the growth rates of the sidebands for the waves with higher perturbation frequencies is more evident than on those of waves with lower perturbation frequencies. In addition, numerical simulations based on Dysthe’s equation with a linear damping term included, which is estimated from the experimental data, can predict the ...
The study examined the conditions under which lay people and health professionals living in Chile... more The study examined the conditions under which lay people and health professionals living in Chile find it acceptable for a physician to break confidentiality to protect the wife of a patient with a sexually transmitted disease (STD). One hundred sixty-nine lay persons, 10 physicians, 17 psychologists, and 11 paramedical professionals indicated the acceptability of breaking confidentiality in 48 scenarios. The scenarios were all possible combinations of five factors: disease severity (severe, lethal); time taken to discuss this with the patient (little time, much time); patient’s intent to inform his spouse about the disease (none, one of these days, immediately); patient’s intent to adopt protective behaviors (no intent, intent); and physician’s decision to consult an STD expert (yes, no), 2 x 2 x 3 x 2 x 2. The study also compared Chilean and French views, using data gathered previously in France. A cluster analysis conducted on the overall set of raw data revealed groups of partic...
New experimental data and theory are reported for obtaining three types of rate parameters contro... more New experimental data and theory are reported for obtaining three types of rate parameters controlling kinetics and molecular weight distributions in free-radical polymerizations. (1) (a) Propagation rate coefficients (kp) for butyl aery late are found using pulsed-laser polymerization, with the novel variant of carrying out the procedure at very low temperatures (−10 to −40 °C); this obviates some problems hitherto found with the technique, (b) A means of calculating kp from first principles from transition state theory is given, using accurate quantum mechanical computation of the transition state properties. These calculations give quantitative accord with experiment for ethylene, and reveal that the magnitude of the frequency factor for propagation is dominated by three hindered rotors in the transition state. Since these rotations are influenced by the penultimate unit, this suggests that significant penultimate unit effects are likely in copolymerizations. The effect of these rotations also explains the observed effect of deuteration on kp. (2) A new technique for measuring the transfer rate coefficient (k tr) is presented: initiation by pulsed laser, whence k tr can be obtained from the high molecular weight slope of a plot of ln(number molecular weight distribution) against molecular weight. The method, which can be employed even when extensive termination is taking place, is tested with transfer from MMA to triethylamine. (3) The rate coefficient for termination can be successfully modelled from a knowledge of the diffusion coefficients for oligomeric species as functions of the degree of polymerization and the polymer fraction. New PFG NMR diffusion data for a series of model compounds in polystyrene/benzene give results for this dependence which are in accord with a semiempirical scaling law suggested previously [Piton MC, Gilbert RG, Chapman BE, Kuchel PW (1993) Macromolecules 26: 4472], suggesting that this scaling should be a useful basis for predicting termination rate coefficients.
Page 1. Chapter 7 Termination Rate Coefficients from Molecular Weight Distributions Paul A. Clay,... more Page 1. Chapter 7 Termination Rate Coefficients from Molecular Weight Distributions Paul A. Clay, David I. Christie, and Robert G. Gilbert Chemistry School, Sydney University, New South Wales 2006, Australia An extended ...
ACM Transactions on Management Information Systems, 2011
Trust plays an important role in many Information Systems (IS)-enabled situations. Most IS resear... more Trust plays an important role in many Information Systems (IS)-enabled situations. Most IS research employs trust as a measure of interpersonal or person-to-firm relations, such as trust in a Web vendor or a virtual team member. Although trust in other people is important, this article suggests that trust in the Information Technology (IT) itself also plays a role in shaping IT-related beliefs and behavior. To advance trust and technology research, this article presents a set of trust in technology construct definitions and measures. We also empirically examine these construct measures using tests of convergent, discriminant, and nomological validity. This study contributes to the literature by providing: (a) a framework that differentiates trust in technology from trust in people, (b) a theory-based set of definitions necessary for investigating different kinds of trust in technology, and (c) validated trust in technology measures useful to research and practice.
... A. Lyons, Jelica Hutovic, Mark C. Piton, † David I. Christie, Paul A. Clay, Bart G. Manders, ... more ... A. Lyons, Jelica Hutovic, Mark C. Piton, † David I. Christie, Paul A. Clay, Bart G. Manders, ‡ Scott H. Kable, and Robert G. Gilbert*. School of Chemistry, Sydney University, Sydney, NSW 2006, Australia. Macromolecules , 1996, 29 (6), pp 1918–1927. DOI: 10.1021/ma950747n. ...
GPC trace = weight distribution (a) GPC n ... I I:, ,:'It MALDI signal = number dist... more GPC trace = weight distribution (a) GPC n ... I I:, ,:'It MALDI signal = number distribution) ... It is particularly applicable to low molecular weights (ca. lo4), is an absolute method requiring no polymer molec-ular-weight calibration, and uses tiny quantities of sample (as low as ...
An experimental investigation focusing on the effect of dissipation on the evolution of the Benja... more An experimental investigation focusing on the effect of dissipation on the evolution of the Benjamin–Feir instability is reported. A series of wave trains with added sidebands, and varying initial steepness, perturbed amplitudes and frequencies, are physically generated in a long wave flume. The experimental results directly confirm the stabilization theory of Segur et al. (J. Fluid Mech., vol. 539, 2005, pp. 229–271), i.e. dissipation can stabilize the Benjamin–Feir instability. Furthermore, the experiments reveal that the effect of dissipation on modulational instability depends strongly on the perturbation frequency. It is found that the effect of dissipation on the growth rates of the sidebands for the waves with higher perturbation frequencies is more evident than on those of waves with lower perturbation frequencies. In addition, numerical simulations based on Dysthe’s equation with a linear damping term included, which is estimated from the experimental data, can predict the ...
Uploads
Papers by paul clay