The Fiber Walk: A Model of Tip-Driven Growth with Lateral Expansion

Tip-driven growth processes underlie the development of many plants. To date, tip-driven growth processes have been modelled as an elongating path or series of segments without taking into account lateral expansion during elongation. Instead, models of growth often introduce an explicit thickness by expanding the area around the completed elongated path. Modelling expansion in this way can lead to contradictions in the physical plausibility of the resulting surface and to uncertainty about how the object reached certain regions of space. Here, we introduce "fiber walks" as a self-avoiding random walk model for tip-driven growth processes that includes lateral expansion. In 2D, the fiber walk takes place on a square lattice and the space occupied by the fiber is modelled as a lateral contraction of the lattice. This contraction influences the possible follow-up steps of the fiber walk. The boundary of the area consumed by the contraction is derived as the dual of the lattice faces adjacent to the fiber. We show that fiber walks generate fibers that have well-defined curvatures, enable the identification of the process underlying the occupancy of physical space. Hence, fiber walks provide a base from which to model both the extension and expansion of physical biological objects with finite thickness.Comment: Plos One (in press

Southern Adventist University Undergraduate Catalog 2012-2013

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Southern Adventist University Undergraduate Catalog 2015-2016

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Southern Adventist University Undergraduate Catalog 2014-2015

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Southern Adventist University Undergraduate Catalog 2013-2014

Southern Adventist University\u27s undergraduate catalog for the academic year 2013-2014.https://knowledge.e.southern.edu/undergrad_catalog/1080/thumbnail.jp

Exploring multimedia and interactive technologies

The goal of multimedia design strategies and innovation is to produce meaningful learning environments that relate to and build upon what the learner already knows and what the learner seeks. The multimedia tools used to achieve knowledge transfer should activate recall or prior knowledge and help the learner alter and encode new structures. Traditionally, multimedia has been localized to specific delivery systems and demographics based on the government, industry, or academic concentration. The presenter will explore the introduction of immersive telecommunications technologies, constructivist learning methodologies, and adult learning models to standardize networking and multimedia-based services and products capable of adapting to wired and wireless environments, different devices and conditions on a global scale

Southern Adventist University Undergraduate Catalog 2011-2012

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Optimizing the Use of Matlab GUI Attributes in the Creation of Calculus Learning Media: An Effort to Measure Students' Innovative Attitudes

Calculus learning requires a high level of visualization in instilling concepts optimally to students. Therefore, the purpose of this study is to look at students' innovative attitudes in developing matlab GUI-based learning media in solving calculus problems and see the influence of the ability to use matlab GUI attributes on the level of innovation of the students in developing learning media. In the early stages, the students developed media according to the given topic. In the second stage, the product was assessed in terms of its validity. The students' innovative attitudes were assessed by a team of experts using questionnaires with 5-point Likert scale. From the 16 media successfully developed, validation results were obtained with an average score of 3.83 which means "valid". Meanwhile, from the assessment of innovative attitudes, the students’ attitudes are in the category of "innovative" with an average score of 3.61. In addition, the results of the regression tests revealed that the innovative attitudes are influenced by the ability to use the matlab GUI attributes by 84.2%. The rest is influenced by other factors with similarities: . Lastly, the results of the assessment showed that the media belonged to the category of "very effective" (score 81.2%).