Variants of Schroeder Dissections

Some formulae are given for the enumeration of certain types of dissections of the convex (n+2)-gon by non-crossing diagonals. The classical Schroeder and Motzkin numbers are addressed using a cataloguing tool, the "reversive symbol". The elementary details are referred to three Web addresses.Comment: 2 page

Guest Post: Fear and Loathing at Shiloh

Everyone is and has been talking about the Shiloh 150th commemoration, whether it be the NPS event starting this week or the battle reenactment that took place this past weekend. It has been called the \u27Antietam of the West.\u27 All the events surrounding its 150th anniversary have been heralded as being one of \u27the big ones\u27 this year. Over 23,000 casualties of both sides in two days - a pretty significant and bloody battle. [excerpt

FOOD DISTRIBUTION CHANGES FROM A JAPANESE PERSPECTIVE

Agribusiness,

Manual control analysis of drug effects on driving performance

The effects of secobarbital, diazepam, alcohol, and marihuana on car-driver transfer functions obtained using a driving simulator were studied. The first three substances, all CNS depressants, reduced gain, crossover frequency, and coherence which resulted in poorer tracking performance. Marihuana also impaired tracking performance but the only effect on the transfer function parameters was to reduce coherence

Vehicle Steering control: A model of learning

A hierarchy of strategies were postulated to describe the process of learning steering control. Vehicle motion and steering control data were recorded for twelve novices who drove an instrumented car twice a week during and after a driver training course. Car-driver describing functions were calculated, the probable control structure determined, and the driver-alone transfer function modelled. The data suggested that the largest changes in steering control with learning were in the way the driver used the lateral position cue

Householder transformations and optimal linear combinations

Several theorems related to the Householder transformation and separability criteria are proven. Orthogonal transformations, topology, divergence, mathematical matrices, and group theory are discussed

Field Recording or Field Observation?: Audio Meets Method in Qualitative Research

The field observation, an ethnographic practice of collecting data and information about a given social setting and situation is often used in preliminary research to have an understanding of the community one is researching. However, from an artist/musician\u27s perspective, the field observation has many commonalities with techniques used in audio field recording. How can field recording be used in parallel with field observations to explore and understand a community through art? This essay will begin with a comparison of field observations and field recordings as methods in their own disciplines, and continue with the concept of “attention” in art, music, science and anthropology. It will follow and conclude with a project that looks at combining qualitative research and art to explore a community of gardeners through recorded interviews and sounds. The work of Pauline Oliveros, Walter S. Gershon, Clifford Geertz, Anne McCrary Sullivan, and Steven Feld will be important in making the connections across disciplines