Peter A. Whigham
YOU?
Author Swipe
View article: Counterfactual reasoning in space and time: Integrating graphical causal models in computational movement analysis
Counterfactual reasoning in space and time: Integrating graphical causal models in computational movement analysis Open
Movement analysis is distinguished by an emphasis on understanding via observation and association. However, an important component of movement from the human and computer modeling perspective is the processes that bring about movement beh…
View article: Quantifying and addressing uncertainty in the measurement of interdisciplinarity
Quantifying and addressing uncertainty in the measurement of interdisciplinarity Open
A common method for quantifying the interdisciplinarity of a publication is to measure the diversity of the publication’s cited references based on their disciplines. Here we examine the criteria that must be satisfied to develop a meaning…
View article: FINAL CODE.zip
FINAL CODE.zip Open
C-code implementing the Wright-Fisher and Moran death/birth and birth/death processes on graphs. Network data is in the network folder; results in the results folder; R code to analyze results and run theoretical models included in R files…
View article: Initialisation and Grammar Design in Grammar-Guided Evolutionary Computation
Initialisation and Grammar Design in Grammar-Guided Evolutionary Computation Open
Grammars provide a convenient and powerful mechanism to define the space of possible solutions for a range of problems. However, when used in grammatical evolution (GE), great care must be taken in the design of a grammar to ensure that th…
View article: Toward greater consistency and validity in measuring interdisciplinarity: a systematic and conceptual evaluation
Toward greater consistency and validity in measuring interdisciplinarity: a systematic and conceptual evaluation Open
While interdisciplinary research (IDR) has attracted much attention, this has not yet resulted in a coherent body of knowledge of interdisciplinarity. One of the impediments is a lack of consensus on its conceptualization and measurement. …
View article: A Vector-agent Approach to (Spatiotemporal) Movement Modelling and Reasoning
A Vector-agent Approach to (Spatiotemporal) Movement Modelling and Reasoning Open
Modelling a complex system of autonomous individuals moving through space and time essentially entails understanding the (heterogeneous) spatiotemporal context, interactions with other individuals, their internal states and making any unde…
View article: Beyond Objects in Space-Time: Towards a Movement Analysis Framework with ‘How’ and ‘Why’ Elements
Beyond Objects in Space-Time: Towards a Movement Analysis Framework with ‘How’ and ‘Why’ Elements Open
Current spatiotemporal data has facilitated movement studies to shift objectives from descriptive models to explanations of the underlying causes of movement. From both a practical and theoretical standpoint, progress in developing approac…
View article: Graph-structured populations and the Hill–Robertson effect
Graph-structured populations and the Hill–Robertson effect Open
The Hill–Robertson effect describes how, in a finite panmictic diploid population, selection at one diallelic locus reduces the fixation probability of a selectively favoured allele at a second, linked diallelic locus. Here we investigate …
View article: Testing the Stationarity Assumption in Software Effort Estimation Datasets
Testing the Stationarity Assumption in Software Effort Estimation Datasets Open
Software effort estimation (SEE) models are typically developed based on an underlying assumption that all data points are equally relevant to the prediction of effort for future projects. The dynamic nature of several aspects of the softw…
View article: Time-Aware Models for Software Effort Estimation
Time-Aware Models for Software Effort Estimation Open
It seems logical to assert that the dynamic nature of software engineering practice would mean that software effort estimation (SEE) modelling should take into account project start and completion dates. That is, we should build models for…
View article: Network rewiring dynamics with convergence towards a star network
Network rewiring dynamics with convergence towards a star network Open
Network rewiring as a method for producing a range of structures was first introduced in 1998 by Watts & Strogatz ( Nature 393 , 440–442. ( doi:10.1038/30918 )). This approach allowed a transition from regular through small-world to a rand…
View article: Managing distance and covariate information with point-based clustering
Managing distance and covariate information with point-based clustering Open
Many problems involve finite locations in geographic space that require estimates of distance-based clustering at many scales. A Monte-Carlo approach to Ripley's K, incorporating covariates and models for distance bias, are crucial when as…
View article: Ecological Responses to 52 Years of Experimental Snow Manipulation in High-Alpine Cushionfield, Old Man Range, South-Central New Zealand
Ecological Responses to 52 Years of Experimental Snow Manipulation in High-Alpine Cushionfield, Old Man Range, South-Central New Zealand Open
Periodic monitoring over 52 years have revealed temporal changes in the vegetation and floristic patterns associated with what has been acclaimed to be the world's oldest known experimental snow fence, which is located on an exposed high-a…
View article: Periglacial tarn on the Rock and Pillar Range crest, south-central South Island, New Zealand, and its surrounding snowbank community
Periglacial tarn on the Rock and Pillar Range crest, south-central South Island, New Zealand, and its surrounding snowbank community Open
A small 18 × 1–5 m, distinctive, teardrop-shaped alpine tarn about 55-cm deep with a variable schist plate rock-silty bed, a wetland rim and surrounding snowbank community is described from a shallow depression in the headwaters of a small…
View article: A Baseline Model for Software Effort Estimation
A Baseline Model for Software Effort Estimation Open
Software effort estimation (SEE) is a core activity in all software processes and development lifecycles. A range of increasingly complex methods has been considered in the past 30 years for the prediction of effort, often with mixed and c…