Backstreaming from oil diffusion pumps Quarterly progress report, 1 Jan. - 31 Mar. 1966

Backstreaming from oil diffusion and turbo-molecular pump

Backstreaming from oil diffusion pumps Final report, Dec. 1, 1963 - May 30, 1966

Backstreaming from oil diffusion and turbomolecular pump

Evolving DNA motifs to predict GeneChip probe performance

Background: Affymetrix High Density Oligonuclotide Arrays (HDONA) simultaneously measure expression of thousands of genes using millions of probes. We use correlations between measurements for the same gene across 6685 human tissue samples from NCBI's GEO database to indicated the quality of individual HG-U133A probes. Low correlation indicates a poor probe. Results: Regular expressions can be automatically created from a Backus-Naur form (BNF) context-free grammar using strongly typed genetic programming. Conclusion: The automatically produced motif is better at predicting poor DNA sequences than an existing human generated RE, suggesting runs of Cytosine and Guanine and mixtures should all be avoided. © 2009 Langdon and Harrison; licensee BioMed Central Ltd

Vlasov Simulations of Trapping and Inhomogeneity in Raman Scattering

We study stimulated Raman scattering (SRS) in laser-fusion conditions with the Eulerian Vlasov code ELVIS. Back SRS from homogeneous plasmas occurs in sub-picosecond bursts and far exceeds linear theory. Forward SRS and re-scatter of back SRS are also observed. The plasma wave frequency downshifts from the linear dispersion curve, and the electron distribution shows flattening. This is consistent with trapping and reduces the Landau damping. There is some acoustic ($\omega\propto k$) activity and possibly electron acoustic scatter. Kinetic ions do not affect SRS for early times but suppress it later on. SRS from inhomogeneous plasmas exhibits a kinetic enhancement for long density scale lengths. More scattering results when the pump propagates to higher as opposed to lower density.Comment: 4 pages, 6 figures. Submitted to "Journal of Plasmas Physics" for the conference proceedings of the 19th International Conference on Numerical Simulation of Plasma

Optimising Existing Software with Genetic Programming

We show genetic improvement of programs (GIP) can scale by evolving increased performance in a widely-used and highly complex 50000 line system. GISMOE found code that is 70 times faster (on average) and yet is at least as good functionally. Indeed it even gives a small semantic gain

Simple Max-Min Ant Systems and the Optimization of Linear Pseudo-Boolean Functions

With this paper, we contribute to the understanding of ant colony optimization (ACO) algorithms by formally analyzing their runtime behavior. We study simple MAX-MIN ant systems on the class of linear pseudo-Boolean functions defined on binary strings of length 'n'. Our investigations point out how the progress according to function values is stored in pheromone. We provide a general upper bound of O((n^3 \log n)/ \rho) for two ACO variants on all linear functions, where (\rho) determines the pheromone update strength. Furthermore, we show improved bounds for two well-known linear pseudo-Boolean functions called OneMax and BinVal and give additional insights using an experimental study.Comment: 19 pages, 2 figure

A Descriptive Study Utilizing Grounded Theory: The Moral-Reasoning Process of Coaches

p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Times New Roman ; }p.MsoBodyText, li.MsoBodyText, div.MsoBodyText { margin: 0in 0in 6pt; font-size: 12pt; font-family: Times New Roman ; }span.BodyTextChar { }div.Section1 { page: Section1; } As an interested reader of the educational literature on moral development I have become intrigued by the significance of moral-reasoning in sport. After nearly four decades of coach education in Canada concern is being voiced about the apparent erosion of moral values amongst many coaches or, at the very least, their moral ambivalence. A database search of the literature and research findings on moral development generally espouses some sort of stage theory (Haan, 1977; Kohlberg, 1958; Weiss, 1987). Through a separate line of inquiry one can find an interest in understanding how coaches learn. Gilbert and Trudel (1999) have researched extensively the impact of experiential learning (Kolb, 1984) and critical reflection (Schön, 1991) on the learning process specifically related to coaching. The intersection of these two lines of research leads to the question of how the moral-reasoning of coaches, in competitive situations, is mediated by the specific sport-based context of their experience. p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Times New Roman ; }p.MsoBodyText, li.MsoBodyText, div.MsoBodyText { margin: 0in 0in 6pt; font-size: 12pt; font-family: Times New Roman ; }span.BodyTextChar { }div.Section1 { page: Section1; } This study utilized the varied cartographic visual mapping techniques developed by Clarke (2005) and described as situational maps, relational analyses, social worlds/arenas maps, etc., which provided the method for analysing the data from interviews and artefacts. Participants’ experiences were explored using self-identified challenging moral dilemmas through a qualitative methodology employing the grounded theory method following the situational analysis (Clarke, 2005) theoretical framework. Grounded theory by its very design is a conceptual framework. Situational analysis provides some structural concepts that, thanks to Clarke (2005), now exist in the literature but it is still conceptual in nature. @font-face { font-family: Times ; }p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Times New Roman ; }p.MsoBodyText, li.MsoBodyText, div.MsoBodyText { margin: 0in 0in 6pt; font-size: 12pt; font-family: Times New Roman ; }span.BodyTextChar { }div.Section1 { page: Section1; } The results indicate that the seemingly eclectic approach to moral-reasoning exhibited by coaches is in fact a complex system of analysis that leads to solutions. The process considers public perception, concepts of universal opportunity as well as short and long-term impact on the specific sport as well as the sport community as a whole. Based the results I was able to develop a model explaining the moral-reasoning employed by the participants in this study. Further research may determine if this can be generalized to a broader segment of the coaching profession. I hope that this model will help coach educators develop better programs to teach coaches about making moral decisions

Backstreaming from oil diffusion pumps summary report, dec. 1, 1963 - nov. 30, 1964

Backstreaming from oil diffusion pump