The Normalization Difference Vegetation Index (NDVI), for many years, was widely used in remote sensing the detection of vegetation land cover. This index uses red channel radiances (i.e., 0.66 μm reflectance) and near-IR 0.86 reflectance). In heavy chlorophyll absorption area, is located, while high reflectance plateau canopies, Near-IR situated. Senses channels (Red & Near- IR) read varia...

Haploid strains of S. cerevisiae were exposed to ultraviolet irradiation, and mutants were isolated by a modified layer plate procedure (Lederberg and Tatum, 1946), using a complete agar as the recovery layer. Six mutants were found which required adenine, two which required uracil. A seventh adenineless mutant was obtained through the courtesy of S. E. Reaume (Reaume and Tatum, 1949). Genetic ...

It is well known that the Newton and the Chebyshev methods for nonlinear systems require solving of a linear system at each iteration step. In this note we shall study two modified methods which avoid solving of linear systems by using the Schultz method to approximate inverses of Fréchet derivatives. At the same time we shall use the particularities of nonlinear systems arising from eigenprobl...

PURPOSES To assess osteoporosis using plain radiography of the calcaneum by studying the performance characteristics of the modified calcaneal index through inter- and intra-observer agreement. To study the correlation of the modified calcaneal index to quantitative ultrasound of the calcaneus and bone mineral density (BMD) of the femoral neck and distal radius. METHODS Lateral calcaneal radi...

n an effort to increase benefits to all CELL division members. including those who are not able to attend the national meeting we will feature Technology Summaries in the division newsletters. These summaries are written by experts in their respective fields and are intended to be a brief overview of the state-of-the-art in a specific topical area. If you have specific technical areas that you ...

When I was asked to comment on the benefits and costs of bridging cognitive psychology, my own field of research, with social psychology, I thought this was easy—the more so as I have a social-psychological background myself (Schultz-Gambard, Feierabend, & Hommel, 1988; Schultz-Gambard & Hommel, 1987). However, addressing this issue requires one to define what a cognitive and a social psycholog...

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