scholarly journals Understanding Cities through Networks and Flows

2017 ◽  
Author(s):  
Geoff Boeing

Complexity theory has become a popular frame for conceptualizing and analyzing cities. The theory proposes that certain large systems are characterized by the nonlinear, dynamic interactions of their many constituent parts. These systems then behave in novel and unpredictable ways—ways that cannot be divined by examining the components of the system. Complexity theory problematizes traditional reductionist, linear methods of scientifically analyzing and predicting cities. It also opens up a new world of scholarship to researchers keen to formulate new kinds of sciences that take complexity into account. These attempts usually follow Kuhn’s theory of paradigm shifts: new evidence and modes of thinking undermine an established science, and a new science emerges to replace it.

2018 ◽  
Vol 39 (04) ◽  
pp. 299-312 ◽  
Author(s):  
Evan Usler ◽  
Anna Bostian ◽  
Ranjini Mohan ◽  
Katelyn Gerwin ◽  
Barbara Brown ◽  
...  

AbstractOver the past 10 years, we (the Purdue Stuttering Project) have implemented longitudinal studies to examine factors related to persistence and recovery in early childhood stuttering. Stuttering develops essentially as an impairment in speech sensorimotor processes that is strongly influenced by dynamic interactions among motor, language, and emotional domains. Our work has assessed physiological, behavioral, and clinical features of stuttering within the motor, linguistic, and emotional domains. We describe the results of studies in which measures collected when the child was 4 to 5 years old are related to eventual stuttering status. We provide supplemental evidence of the role of known predictive factors (e.g., sex and family history of persistent stuttering). In addition, we present new evidence that early delays in basic speech motor processes (especially in boys), poor performance on a nonword repetition test, stuttering severity at the age of 4 to 5 years, and delayed or atypical functioning in central nervous system language processing networks are predictive of persistent stuttering.


2016 ◽  
Vol 90 (2) ◽  
pp. 317-332 ◽  
Author(s):  
Alexander K. Hastings ◽  
Moritz Reisser ◽  
Torsten M. Scheyer

AbstractAlligators and caimans share a close relationship, supported by both molecular and morphological characters. The divergence between alligators and caimans has been difficult to discern in the fossil record. Two basal taxa have recently been described from the Miocene of Panama and Venezuela but have not yet been presented in a joint phylogeny. Continued preparation of the type material of the Venezuelan Globidentosuchus brachyrostris Scheyer et al., 2013 has revealed new characters for scoring in a cladistic framework. In addition, the first lower jaw of the Panamanian Centenariosuchus gilmorei Hastings et al., 2013 is described herein, and additional characters were scored. In total, we conducted five cladistic analyses to better understand the character evolution involved in the establishment of Caimaninae. In each case, Globidentosuchus appears as the basal-most of the caimanine lineage, followed by Culebrasuchus mesoamericanus Hastings et al., 2013 from Panama. Stepwise character additions of synapomorphies define progressively more derived caimanines, but stratigraphic context creates ghost lineages extending from the Miocene to Paleocene. The persistence of two basal taxa into the Miocene of northern South America and Central America supports the concept of a relict basal population in this region. This further supports biogeographic hypotheses of dispersals in both directions between North and South America prior to full land connection.


1997 ◽  
Vol 35 (01) ◽  
pp. 35-0110-35-0110
Keyword(s):  

Author(s):  
Geoffrey Ngene ◽  
Jinghua Wang ◽  
M. Kabir Hassan ◽  
Ivan Julio ◽  
Jung-Suk Yu

1986 ◽  
Vol 7 (1) ◽  
pp. 77-88
Author(s):  
Sheldon S. Wolin

The text which serves as the basis for the reflections which follow is a single sentence from Tocqueville’s Democracy in America: “A new science of politics is indispensable to a wholly new world.”


Isis ◽  
2000 ◽  
Vol 91 (1) ◽  
pp. 144-144
Author(s):  
Pamela Gossin
Keyword(s):  

2013 ◽  
Vol 20 (6) ◽  
pp. 1093-1101 ◽  
Author(s):  
Aline Souza de Paula ◽  
José Manoel Balthazar ◽  
Jorge Luis Palacios Felix

This paper presents a nonlinear dynamic analysis of a flexible portal frame subjected to support excitation, which is provided by an electro-dynamical shaker. The main goal of this study is to investigate the dynamic interactions between a flexible portal frame and a nonlinear electrical support excitation. The numerical analysis shows a complex behavior of the system, which can be observed by phase spaces, Poincaré sections and bifurcation diagrams.


2018 ◽  
Vol 143 (25) ◽  
pp. 1820-1825
Author(s):  
Christian Hick

AbstractParacelsus was an adventurer in more than one way. We retrace the little that is known about his life and then focus on his adventures in the history of ideas, namely the scientific revolution he brought about for humoral pathology. Following the landmark study of Pagel (1982) we identify two of his conceptions of disease: diseases as fruits and diseases as minerals, discovered by a new science, a “scientia separationis”. Paracelsus did not merely polemize against humoral pathology, but offered a new world view, a new paradigm, so that his endeavor can be characterized with Kuhn (1962) as a scientific revolution.


2008 ◽  
Vol 36 (5) ◽  
pp. 852-864 ◽  
Author(s):  
Angelika Dimoka ◽  
Spiros H. Courellis ◽  
Vasilis Z. Marmarelis ◽  
Theodore W. Berger

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