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A Comparison Between Pixe Studies And Electron Microprobe Studies Of Rocks From Southern India., Graham F. Peaslee, D. A. Carlson, E. C. Hansen, S. S. Hendrickson, R. J. Timmer, A. L. Van Wyngarden, J. D. Wilcox
A Comparison Between Pixe Studies And Electron Microprobe Studies Of Rocks From Southern India., Graham F. Peaslee, D. A. Carlson, E. C. Hansen, S. S. Hendrickson, R. J. Timmer, A. L. Van Wyngarden, J. D. Wilcox
Faculty Publications
The Hope College PIXE facility was used to perform an analysis of zircons, apatites and monazites prevalent in rocks collected in southern India. Thin sections of the samples were prepared for electron microprobe analysis at U. Chicago, and a number of rare earth elements were quantitatively measured. These samples were then fractured and individual crystals were analyzed with 2.3 MeV protons in an internal PIXE irradiation chamber. GUPIX II© software was used to identify and measure trace metals in the samples and the results have been correlated with the electron microprobe data. Whole rock analyses, prepared by making pressed pellets …
Disappearance Of Rotational Flow And Reaction Plane Dispersions In Kr+Au Collisions, W. Q. Shen, M. B. Tsang, N. Carlin, R. J. Charity, J. Feng, C. K. Gelbke, W. C. Hsi, M. J. Huang, G. J. Kunde, M-C. Lemaire, M. A. Lisa, W. G. Lynch, U. Lynen, Y. G. Ma, Graham F. Peaslee, L. Phair, J. Pochodzalla, H. Sann, C. Schwarz, L. G. Sobotka, R. T. De Souza, S. R. Souza, W. Trautmann, C. Williams
Disappearance Of Rotational Flow And Reaction Plane Dispersions In Kr+Au Collisions, W. Q. Shen, M. B. Tsang, N. Carlin, R. J. Charity, J. Feng, C. K. Gelbke, W. C. Hsi, M. J. Huang, G. J. Kunde, M-C. Lemaire, M. A. Lisa, W. G. Lynch, U. Lynen, Y. G. Ma, Graham F. Peaslee, L. Phair, J. Pochodzalla, H. Sann, C. Schwarz, L. G. Sobotka, R. T. De Souza, S. R. Souza, W. Trautmann, C. Williams
Faculty Publications
Two-particle azimuthal correlations have been used to extract reaction plane dispersion free triple-differential cross sections for d, t, and α particles for the midcentral collisions of 84Kr+197Au at E/A=35, 55, and 70 MeV. Both experimental measurements and extrapolations from lower incident energies suggest that rotational flow disappears at E/A≈100 MeV for light charged particles and that reaction plane dispersions introduce large uncertainties in extracting the disappearance of rotational flow.
Creation Care And Character: The Nature And Necessity Of The Ecological Virtues, Steven C. Bouma-Prediger
Creation Care And Character: The Nature And Necessity Of The Ecological Virtues, Steven C. Bouma-Prediger
Faculty Publications
This article explores a neglected but significant area of research in ecological ethics, namely, virtue theory. More precisely, the author attempts to answer this cluster of questions: What exactly is a virtue? Are there particular virtues which arise from a biblically informed Christian ecological ethic? If so, what are those virtues? How important are they? Are they merely nice to have or are they necessary? The thesis is that certain virtues--like frugality, humility, and wisdom--are indispensable if Christians are to responsibly fulfill their calling to be earthkeepers. In short, certain character traits are central to creation care.
Impact Parameter Dependence Of Light Charged Particle Production In 25 A Mev 16o On Tb, Ta And 35 A Mev 14n On Sm And Ta, D. Prindle, A. Elmaani, C. Hyde-Wright, W. Jiang, A. A. Sonzogni, R. Vandenbosch, D. Bowman, G. Cron, P. Danielewicz, J. Dinius, W. Hsi, W. G. Lynch, C. Montoya, Graham F. Peaslee, C. Schwarz, M. B. Tsang, C. Williams, R. T. De Souza, D. Fox, T. Moore
Impact Parameter Dependence Of Light Charged Particle Production In 25 A Mev 16o On Tb, Ta And 35 A Mev 14n On Sm And Ta, D. Prindle, A. Elmaani, C. Hyde-Wright, W. Jiang, A. A. Sonzogni, R. Vandenbosch, D. Bowman, G. Cron, P. Danielewicz, J. Dinius, W. Hsi, W. G. Lynch, C. Montoya, Graham F. Peaslee, C. Schwarz, M. B. Tsang, C. Williams, R. T. De Souza, D. Fox, T. Moore
Faculty Publications
The impact parameter dependence of light charged particle (p,d,t,α) emission has been studied using an impact parameter selection based on coincident detection of residues or fission fragments. The energy spectra at twelve angles between 20° and 150° have been fit by a multiple moving source parametrization. The angle and energy integrated preequilibrium proton multiplicities decrease with increasing impact parameter in qualitative agreement with a Fermi jet calculation. The preequilibrium d/p and t/p multiplicities increase slowly with increasing impact parameter and are nearly identical at the two bombarding energies. The preequilibrium α/p ratio shows a less consistent dependency on impact parameter …
Radical Ion Probes. 8. Direct And Indirect Electrochemistry Of 5,7-Di-Tert-Butylspiro[2.5]Octa-4,7-Dien-6-One And Derivatives, J. Paige Phillips, Jason G. Gillmore, Phillip Schwartz, Larry E. Brammer Jr., Daniel J. Berger, J. M. Tanko
Radical Ion Probes. 8. Direct And Indirect Electrochemistry Of 5,7-Di-Tert-Butylspiro[2.5]Octa-4,7-Dien-6-One And Derivatives, J. Paige Phillips, Jason G. Gillmore, Phillip Schwartz, Larry E. Brammer Jr., Daniel J. Berger, J. M. Tanko
Faculty Publications
Results pertaining to the direct and indirect electrochemistry of 5,7-di-tert-butylspiro[2.5]octa-4,7-dien-6-one (1a), 1-methyl-5,7-di-tert-butylspiro[2.5]octa-4,7-dien-6-one (1b), and 1,1,-dimethyl-5,7-di-tert-butylspiro[2.5]octa-4,7-dien-6-one (1c) are reported. Product analyses reveal that reduction of all these substrates leads to cyclopropane ring-opened products; ring opening occurs with modest selectivity leading to the more substituted (stable) distonic radical anion. The direct electrochemistry of these compounds is characterized by rate limiting electron transfer (with α ≈ 0.5), suggesting that while ring opening is extremely rapid, the radical anions do have a discrete lifetime (i.e., electron transfer and ring opening are not concerted). Utilizing homogeneous redox catalysis, rate constants for electron transfer between 1a, …
Review Of Earth Community Earth Ethics, By Larry Rasmussen, Steven C. Bouma-Prediger
Review Of Earth Community Earth Ethics, By Larry Rasmussen, Steven C. Bouma-Prediger
Faculty Publications
No abstract provided.
Why Care For Creation?: From Prudence To Piety, Steven C. Bouma-Prediger
Why Care For Creation?: From Prudence To Piety, Steven C. Bouma-Prediger
Faculty Publications
Why should people, and Christians in particular, care for creation? What reasons, what arguments, are there for taking our ecological responsibilities more seriously? In this article Steven Bouma-Prediger presents and evaluates ten arguments for caring for creation. His main claim is that for a variety of good reasons, like Dr. Seuss's Lorax, Christians should speak for the trees---they should care for non-human creation. Mr. Bouma-Prediger teaches in the religion department at Hope College.