Based on the theory of calculus on time scales, the homeomorphism theory, Lyapunov functional method, and some analysis techniques, sufficient conditions are obtained for the existence, uniqueness, and global exponential stability of the equilibrium point of Cohen-Grossberg bidirectional associative memory BAM neural networks with distributed delays and impulses on time scales. This is the firs...

In this paper, a class of impulsive BAM fuzzy cellular neural networks with time delays in the leakage terms is formulated and investigated. By establishing a delay differential inequality and M -matrix theory, some sufficient conditions ensuring the existence, uniqueness and global exponential stability of equilibrium point for impulsive BAM fuzzy cellular neural networks with time delays in t...

The relationship between student engagement and learning outcomes has been extensively studied in the context of online learning. However, it has been less investigated in face-toface learning. In this paper, we describe initial findings from a study of student engagement and outcomes at a ‘bricks-and-mortar’ (BaM) university, where engagement is characterized by a diverse set of systems and ag...

In this paper, a class of impulsive BAM fuzzy cellular neural networks with distributed delays and reaction-diffusion terms is formulated and investigated. By employing the delay differential inequality and inequality technique developed by Xu et al., some sufficient conditions ensuring the existence, uniqueness and global exponential stability of equilibrium point for impulsive BAM fuzzy cellu...

In Drosophila, male and female gametes begin development when a stem cell divides to produce a cyst precursor. Subsequently, four special divisions give rise to a cluster of 16 interconnected cystocytes that develop into a single egg or 64 sperm. We identified and characterized a gene, bag-of-marbles (bam), that disrupts cyst formation in both sexes. An apparent null mutation causes abnormal cy...

Research has shown that human beings are able to perform various associations, whether linearly separable or nonlinearly separable, with little effort. While bidirectional associative memory (BAM) models show great promise in modeling various types of associations the humans perform, they still have difficulties with solving various types of nonlinearly separable problems. The present study int...

Selection of asymmetric cell fates can involve both intrinsic and extrinsic factors. Previously we have identified the bag-of-marbles (bam) gene as an intrinsic factor for cystoblast fate in Drosophila germline cells and shown that it requires active product from the benign gonial cell neoplasm (bgcn) gene. Here we present the cloning and characterization of bgcn. The predicted Bgcn protein is ...

β-Barrel outer membrane proteins (OMPs) are found in the outer membranes of Gram-negative bacteria and are essential for nutrient import, signaling, and adhesion. A 200-kilodalton five-component complex called the β-barrel assembly machinery (BAM) complex has been implicated in the biogenesis of OMPs. We report the structure of the BAM complex from Escherichia coli, revealing that binding of Ba...

Photodynamic sensitizers are drugs activated by light of a specific wavelength and are used in the photodynamic therapy (PDT) of certain diseases. Second- and third-generation photosensitizers with improved PDT properties are now under investigation. In this issue of the British Journal of Pharmacology, Leung et al. have described the synthesis and investigation of a second-generation photosens...

In this paper, we describe our Brand Association MapTM (BAM) tool which maps and visualizes the way consumers naturally think and talk about brands across billions of unaided conversations online. BAM is a semi-supervised tool that leverages text-mining algorithms to identify key correlated phrases, terms and issues out of millions of candidate terms which were derived from billions of online c...