Many animals have an abundance and diverse assortment of peripheral sensors, both across and within sensory modalities. Multiple sensors offer many functional advantages to an animal's ability to perceive and respond to environmental signals. Advantages include extending the ability to detect and determine the spatial distribution of stimuli, improving the range and accuracy of discrimination a...

Osteoporosis is widely viewed as a major public health concern, but the exact magnitude of the problem is uncertain and likely to depend on how the condition is defined. Noninvasive bone mineral measurements can be used to define a state of heightened fracture risk (osteopenia), or the ultimate clinical manifestation of fracture can be assessed (established osteoporosis). If bone mineral measur...

A symmetric m×m matrix M with entries taken from {0, 1, ∗} gives rise to a graph partition problem, asking whether a graph can be partitioned into m vertex sets matched to the rows (and corresponding columns) of M such that, if Mij = 1, then any two vertices between the corresponding vertex sets are joined by an edge, and if Mij = 0 then any two vertices between the corresponding vertex sets ar...

BACKGROUND Uninformed generalizations about how many elderly people have ever lived, based on a poor understanding of demography, are found in a surprising number of important publications. OBJECTIVE We extend the methodology applied to the controversial question “how many people have ever been born?” initiated by Fucks, Winkler, and Keyfitz, to the proportion of people who have ever reached a ...

Enterprise Resource Planning (ERP) systems have become an essential information systems infrastructure for large organisations. These organisations are now looking for ways to leverage their ERP investment by introducing new functionality. However no matter how many implementations these companies have undertaken the same people issues still provide barriers. This research looks at the change m...

Humans perceive and reproduce short intervals of time (e.g. 1-60s) relatively accurately, and are capable of timing multiple overlapping intervals if these intervals are presented in different modalities [e.g., Rousseau, L., & Rousseau, R. (1996). Stop-reaction time and the internal clock. Perception and Psychophysics, 58(3), 434-448]. Tracking multiple intervals can be explained either by assu...

We prove that any uncountable group G of power ~, has at least 2 subgroups not conjugate in pairs. The paper is very self-contained, assuming no knowledge except cardinal arithmetic (and the definition of an (abelian) group).

The patented[3] Email Channels technology[1, 2], invented and originally developed by me during the latter half of the 1990s at AT&T Laboratories Research and currently being commercialized by ZoEmail LLC[4], allows a user effectively to have many variants of a common “base” address, with each variant to be used by a different set of correspondents. The variants, also known as channels or chann...