Brenda Timmerman

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The T-DNA transfer process of Agrobacterium tumefaciens is activated by the induction of the expression of the Ti plasmid virulence (vir) loci by plant signal molecules such as acetosyringone. The vir gene products act in trans to mobilize the T-DNA element from the bacterial Ti plasmid. The T-DNA is bounded by 25-base pair direct repeat sequences, which(More)
As public internetworks are increasingly used for secure communications, the need grows for end-to-end protection fi'om traffic analysis. The additional protection of Traffic Flow Confidentiality can be detrimental to performance when padding is used to mask traffic patterns. Traffic masking policies that are responsive to system service requirements can(More)
 Computer Science students especially upper division students are stereotypically considered to be introverted and therefore poor candidates for an Active Learning curriculum. Ironically, the requirements of their field demand skills in critical analysis and evaluation, as well as communication and collaboration skills, that are not easily acquired in the(More)
Researchers evaluate and contrast new network routing, admission control, congestion control and flow control algorithms through simulation. Analytically de-rived arguments justifiably lack credibility because, in the attempt to model the underlying physical system, the analyst is forced to make compromising approximations. However, unlike analytical(More)
This paper describes the assessment and evaluation of experiments with active learning techniques performed in upper division Computer Science classes at California State University, Northridge (CSUN). In spite of the traditional views of Computer Science as an individualistic subject matter that attracts introverted, non-social students, the authors used(More)
This study explores both theoretically and experimentally the human perception of polarized light beyond that currently established. The radial analyser theory of Haidinger's phenomenon (HP) is used to predict the effect of observing visual stimuli comprising patterned zones characterized by orthogonal planes of linear polarization (linear polarization(More)
A large number of students who begin the computer science program at California State University, Northridge never finish. Although many students who leave the computer science program eventually graduate in other fields, the high number of drop outs is of concern. Previous studies have shown that computer science students nearing graduation tend to have(More)
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