Winter 1970

A Closer Look at Watering by Holman M. Griffin (page 3) Sulphur in Turfgrass Fertilization by J.D. Beaton (5) Those Extras on a Golf Course by Jack Fairhurst (9) Turf Bulletin\u27s Photo Quiz by Fred Cheney (9) Progress in Research on Live Oak Decline by E.P. Van Arsdel and Robert S. Halliwell (10) Editorial (15) The Perfermance Characteristics of Kentucky Bluegrass Mixtures by F.V. Juska and A.A. Hanson (16) Moss (23

Lead selection, cardiac axes, and interpretation of electrocardiograms in beef cattle

Published November 1959. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalo

Age changes in the EKG of beef cattle

Published June 1963. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalo

Computational shelf-life dating : complex systems approaches to food quality and safety

Shelf-life is defined as the time that a product is acceptable and meets the consumers expectations regarding food quality. It is the result of the conjunction of all services in production, distribution, and consumption. Shelf-life dating is one of the most difficult tasks in food engineering. Market pressure has lead to the implementation of shelf-life by sensory analyses, which may not reflect the full quality spectra. Moreover, traditional methods for shelf-life dating and small-scale distribution chain tests cannot reproduce in a laboratory the real conditions of storage, distribution, and consumption on food quality. Today, food engineers are facing the challenges to monitor, diagnose, and control the quality and safety of food products. The advent of nanotechnology, multivariate sensors, information systems, and complex systems will revolutionize the way we manage, distribute, and consume foods. The informed consumer demands foods, under the legal standards, at low cost, high standards of nutritional, sensory, and health benefits. To accommodate the new paradigms, we herein present a critical review of shelf-life dating approaches with special emphasis in computational systems and future trends on complex systems methodologies applied to the prediction of food quality and safety.Fundo Europeu de Desenvolvimento Regional (FEDER) - Programa POS-ConhecimentoFundação para a Ciência e a Tecnologia (FCT) - SFRH/BPD/26133/2005, SFRH/ BPD/20735/200

Role of cognitive style in children's performance on Piagetian tasks

Recently interest has focussed on Witkin's notion of cognitive style (Goodeneough 1978, Donaldson 1982, Messick 1982). Witkin's development of differentiation theory arose from studies concerning the way people orientate their bodies in space and is closely related to the individual's perceptual ability. Field-dependence/field-independence theory is primarily concerned with how people deal with information about the world rather than with how much or how well they do so (Goodenough 1978). Links (Case and Pascual-Leone 1975, Satterly 1979, Huteau 1980) were cited between the work of Piaget and Witkin. Goodenough (1978) wrote that the field-dependence dimension could be identified in problem-solving situations that seemed to require re-structuring. Some of the best illustrations of re-structuring problems come from the work of Piaget. As perceptual demands and materials of Piagetian conservation tasks and characteristics of Witkin's field-dependence/field-independence notion seemed well related it was hypothesised that a relationship might exist between children's performances on Piagetian tasks and their responses to Witkin measures of cognitive style. The study was of a longitudinal design. Four consecutive testing situations at three month intervals aimed to compare children's (N = 65) performance on a battery of six Piagetian conservation tasks (two each of length, area and horizontal/vertical frames of reference) with these same six-seven year old children's scores for two Witkin measures of field-dependence, the Children's Embedded Figures Test (CEFT) and the Draw-a-Figure Test (DAF). As field-dependent subjects are thought to respond to, and process more easily, information presented them in a social or personal manner, one Piagetian task of each of the three areas, length, area and horizontal/vertical frames of reference, was presented in a 'social' manner while the other was administered in an 'impersonal' or abstract manner reported by Witkin et al (1974) as more easily accomplished by field-independent persons. Results of the study gave some limited support to the hypothesis that a relationship might exist between children's performances on Piagetian tasks and their responses to Witkin's Children's Embedded Figures Test. It was also apparent that a majority of children, whether field-dependent or field-independent, were more successful in accomplishing the Piagetian tasks presented in a 'social' manner than they were at accomplishing those presented in an 'impersonal' fashion. Further, the two Witkin measures of cognitive style (CEFT and DAF) did not correlate. Vernon (1972), Bawd (1975) and Satterly' (1976) also have not found agreement between these two Witkin measures of field-dependence. The implications of the study call attention to the complexity of factors which contribute to the teaching/learning situation and of the need for further work relating style or method of presentation to the content of the material