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nonlinear-relationships

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Journal Articles
The American Biology Teacher (2016) 78 (8): 635–641.
Published: 01 October 2016
... environment is used for context to promote an understanding of interdependent ecological relationships and the nonlinear and sustaining effects of loss of species. The Food Web DRP tasks we describe are designed for classroom implementation in alignment with the Next Generation Science Standards. The intended...
Journal Articles
The American Biology Teacher (2017) 79 (3): 200–206.
Published: 01 March 2017
... nonlinear the scientific process is, not questioning how the information in textbooks and lectures was obtained. Science can seem closed, and the process of research mysterious and elite. Further, a Muhlenberg College internal assessment survey revealed over half our students beginning their first science...
Journal Articles
The American Biology Teacher (2017) 79 (3): 169–173.
Published: 01 March 2017
...) demonstrated a direct relationship between recurrence of the Plague and warmer temperatures. These associations suggest that climate can affect infectious disease in a nonlinear fashion ( Lafferty, 2009 ). Even small changes in seasons may increase the rate of spread exponentially when a new population...
Journal Articles
The American Biology Teacher (2014) 76 (8): 493–498.
Published: 01 October 2014
... explanation for macroevolutionary transitions was strictly banned as heretical. Things are different today, however, because of an appreciation of the nonlinear character of the genotype→phenotype map. A single-gene mutation was probably responsible for the change from radial to bilateral symmetry in the...
Journal Articles
The American Biology Teacher (2014) 76 (1): 34–41.
Published: 01 January 2014
..., zoos, aquariums, national parks, and science centers. Informal science learning is self-guided, nonlinear, and social ( Liu, 2009 ). The range of informal science learning also includes visiting exhibits, pursuing interests and hobbies, and participating in community education programs ( Rennie...
Journal Articles
The American Biology Teacher (2011) 73 (4): 222–226.
Published: 01 April 2011
... college students are equally dismissive and ignorant of evolutionary biology. Given the assumptions of nonlinearity used in logistic regression models, we could not directly interpret the coefficients for the independent variables. Instead, we used a Monte Carlo simulation to transform the logistical...
Journal Articles
The American Biology Teacher (2010) 72 (1): 6.
Published: 01 January 2010
... in an ecosystem. Mathematics is used regularly by biological researchers, and our students should be using math regularly as well. Modern ecologists use chaos theory to study the nonlinear complexities in an ecosystem. Is it possible that our students use chaos theory too? •• Realistically...
Journal Articles
The American Biology Teacher (2002) 64 (8): 589–595.
Published: 01 October 2002
... the x and y relationship. Next we move to nonlinear relationships, specifical- ly exponential equations. These are important since many natural processes (e.g., dissolved gas diffusion, microbial growth, etc.) are best described by exponen- tial and logarithmic equations. Figure 1 shows one decreasing...
Journal Articles
The American Biology Teacher (2003) 65 (2): 116–121.
Published: 01 February 2003
... desirable plot is one that exhibits no apparent pattern and one that does not have one or two points that are far removed from the others. Patterns in the residual plot may suggest nonlinearity, nonconstant variation, or potentially influencing observations, all of which can negatively affect the...
Journal Articles
The American Biology Teacher (2001) 63 (2): 132–135.
Published: 01 February 2001
... the 1980s, physi- cists developed the idea of stochastic 134 THE AMERICAN BIOLOGY TEACHER, VOLUME 63, NO. 2, FEBRUARY 2001 resonance which means that a certain level of noise can actually enhance the ability of some nonlinear systems to detect and transmit weak signals. Since then such phenomena have...
Journal Articles
The American Biology Teacher (2000) 62 (4): 249–255.
Published: 01 April 2000
... theory of develop- ment. Human Development, 18, 50-64. Riegel 50 18 Human Development 1975 Thatcher, R.W. (1990, June). Nonlinear dynamics of human cerebral development. Paper presented at the Interna- tional Conference on Machinery of the Mind, Havana, Cuba. Thatcher Nonlinear...
Journal Articles
The American Biology Teacher (1997) 59 (8): 513–517.
Published: 01 October 1997
... increas- ing wall stress, otherwise the vessel will rupture. Most pressurized elastic- walled vessels (both human-made and natural) have solved this problem by having vessel walls that become in- creasingly stiffer as the wall expands. These nonlinear properties resolve the problem, because the wall can...
Journal Articles
The American Biology Teacher (1995) 57 (1): 56–59.
Published: 01 January 1995
... of chaos has become so popular in so many different fields because it can be used to describe the behavior of complex systems. Chaos is one aspect of the broader theory of complexity, since complex systems may display chaotic behavior. Com- plex systems display nonlinear dy- namics; in other words...
Journal Articles
The American Biology Teacher (1986) 48 (5): 301–303.
Published: 01 May 1986
... concentrations in this experi- mental protocol may also lead to a nonlinear relationship. Other solutes (e.g., sucrose, calcium, potassium, so- dium, heavy metals, or combinations of these) might also be usable in alter- nate types of investigations. These data were obtained at a tem- perature of approximately...
Journal Articles
The American Biology Teacher (1985) 47 (3): 176–178.
Published: 01 March 1985
... nonlinear relationships it has been traditional to teach this material by reporting the results of specific ex- periments. While our knowledge must be based upon experimental results, the diversity of living material can make this learning approach conducive to memorization. Such knowledge may be short...
Journal Articles
The American Biology Teacher (1980) 42 (1): 16–22.
Published: 01 January 1980
... the outer two loci. This illustrates another principle of link- GENE MAPPING 19 age, that is, the nonlinear relationship between map distance and percent recombination at large distances (fig. 2). The accuracy of determining map distances can be increased by using loci that are located closer together...
Journal Articles
The American Biology Teacher (1979) 41 (3): 171–175.
Published: 01 March 1979
... attempts to portray. A nonlinear, two- dimensonal concept map, on the other hand, can be thought of as a scheme including not only cities, but also as a chart describing the major highways (propositions) that link them. Furthermore, not all cities have the same population density; neither will the concepts...
Journal Articles
The American Biology Teacher (1974) 36 (9): 534–556.
Published: 01 December 1974
... fertilizer use on a national basis. Yields as shown in fig. 2 respond to fertilizer in a nonlinear fashion. On a national basis the flat portion of the curve has not yet been attained and productivity will continue to increase with increased application of fertilizer. However, many individual farmers now...
Journal Articles
The American Biology Teacher (1972) 34 (6): 322–328.
Published: 01 September 1972
... order to emphasize the nonlinearity of our ma- terials, we have actually had the cards in our packets randomly packed. Some teachers choose to develop a linearity of their own, but most frequently this linearity is related more to the risks the teacher is willing to take with the students than to the...
Journal Articles
The American Biology Teacher (1968) 30 (6): 488–503.
Published: 01 August 1968
... experimental studies. The treatment of quantitative data can be as complicated as the use of a mathematical model that employs several simultaneous, nonlinear differential equations, and that re- quires the use of a computer for solution. Statistical treatment may be as complex as variance analysis of data...