THE USE OF DISCRETE VARIABLES TO ESTIMATE PRICE AND INCOME ELASTICITIES FOR PRODUCTS WITH SEASONAL CONSUMPTION PATTERNS

Food Consumption/Nutrition/Food Safety,

The Maternal Perinatal Scale as a predictor of developmental risk

With increases in medical technology, infant mortality has decreased, while infant morbidity has increased over the past half century. Moreover, the definition of high-risk pregnancy continues to lack true universal acceptance. Thus, continued research in the area of perinatal complications is warranted. There have been studies that have suggested short-term and long-term deficits considered to be secondary to perinatal complications. Psychologists often gather information about a given child’s perinatal history, but do not always have means to interpret how those complications may impact the child later in life. The Maternal Perinatal Scale (MPS) has been shown to have good reliability and validity in past studies, but a scoring system has yet to be established. This project consisted of two studies. The first study created a preliminary scoring system for the developmental questionnaire, the Maternal Perinatal Scale. This questionnaire has proven to have potential for good clinical utility, but prior to this study, had nothing beyond item-by-item analysis for interpreting the results. To test the validity of the proposed scoring system, a second study was conducted to determine cutoff scores and classification rates for the scoring system on data previously collected with children in elementary school. Results revealed proposed scores for each item on the MPS and classification rates associated with certain developmental disorders later in life.Department of Educational PsychologyThesis (Ph. D.

Shock excitation of the knots of Hen 3-1475

We present new optical STIS HST spectroscopic observations of the jets of the proto-planetary nebula Hen 3-1475. The excitation conditions of the knots of Hen 3-1475 are derived from the observed optical spectra, confirming that the knots are shock excited. The shocked spectra are qualitatively reproduced by simple ``3/2''D bow shock models. We present a set of bow shock models devoted to planetary nebulae, and discuss the effects of the pre-ionization conditions, the bow shock velocity, the bow shock shape and the chemical abundances on the predicted spectra. To explore the reliability of the ``3/2''D bow shock models, we also compare the observed spectra of other three proto-planetary nebulae (M 1-92, M 2-56 and CRL 618) to the predicted spectra.Comment: 13 pages. A&A (in press

Post Sockets: Towards an Evolvable Network Transport Interface

The traditional Sockets API is showing its age, and no longer provides effective support for modern networked applications. This has led to a proliferation of non-standard extensions, alternative APIs, and workarounds that enable new features and allow applications to make good use of the network, but are difficult to use, and require expert knowledge that is not widespread. In this paper, we present Post Sockets, a proposed new standard network API, that is designed to support modern network transport protocols and features, while raising the level of abstraction and enhancing usability. Specifically, Post Sockets aims to give portable applications the ability to use a clear, messages based, interface to multi-path and multi-stream transports, rendezvous and connection racing, and fast connection re-establishment

Inviscid analysis of the plume created by multiple rocket engines. Part II - Description of the computer programs

Computer program for calculation of single jet and five jet interaction regimes associated with multiple rocket engine