Until recently, African trypanosomes of the species Trypanosoma (T . ) brucei which are the causative agents of sleeping sickness in man and Nagana disease in cattle, were believed to multiply solely by binary fission. In the early eighties, evidence for a system of genetic exchange was obtained indirectly from the analysis of enzyme electrophoretic variation between stocks isolated from natura...

Bilayer graphene has been a subject of intense study in recent years. The interlayer registry between the layers can have dramatic effects on the electronic properties: for example, in the presence of a perpendicular electric field, a band gap appears in the electronic spectrum of so-called Bernal-stacked graphene [Oostinga JB, et al. (2007) Nature Materials 7:151-157]. This band gap is intimat...

This commentary addresses Bowen et al’s empirical study of perspectives of Canadian healthcare staff towards research and their call for multi-faceted action to improve misalignments in the system. This commentary argues that tensions and misalignments between research and service are inherent and can never be eradicated. Building on previous work by Lanham et al, I pro...

The new species is a member of an apparently monophyletic group within the genus that includes R. flexile, R. walga, R. himanturi, R. burgeri, R. euzeti, R. hawaiiensis, R. urobatidium, R. paratrygoni, R. ditesticulum, R. tetralobatum, R. margaritense, R. biorchidum, and R. spinicephalum. All of these species have bothridia with medial longitudinal septa, a constriction at mid-bothridium, and, ...

The spread of invasive species can have far reaching environmental and ecological consequences. Understanding invasion spread patterns and the underlying process driving invasions are key to predicting and managing invasions. We develop a set of statistical methods to characterize local spread properties and demonstrate their application using historical data on the spread of the gypsy moth, Ly...

The interaction of cells with the extracellular matrix is important in regulating cell growth, differentiation, migration and survival (Hynes, 1990). Integrins are a major class of transmembrane receptors that mediate cell adhesion to fibronectin (Hynes, 1992; Pytela et al., 1985) as well as to other extracellular matrix proteins (Hynes, 1992; Ruoslahti, 1988; Yamada, 1989). Binding of extracel...

Correction for ‘Unveiling of interstice-occupying dopant segregation at grain boundaries in perovskite oxide dielectrics a new class ceramic capacitors’ by Ji-Sang An et al. , Energy Environ. Sci. 2023, https://doi.org/10.1039/d2ee03152c.

Grutters et al show that economic assessments can inform the development of new health technologies at an early stage. This is an important contribution to health services and policy research, which implies a “shift away” from the more traditional forms of academic health economic modeling. Because transforming established disciplinary traditions is both valuable and de...

We present a simple global asymptotic stability analysis, by using passivity theory for a class of nonlinear PID regulators for robot manipulators. Nonlinear control structures based on the classical PID controller, which assure global asymptotic stability of the closed-loop system, have emerged. Some works that deal with global nonlinear PID regulators based on Lyapunov theory have been report...