David McCracken

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In 1991, Deloitte & Touche got a wake-up call about its efforts to retain women professionals. While it was recruiting almost as many women as men, the company had a much higher turnover rate for women. Many in the firm thought Deloitte was doing everything it could to retain talented women, but when they looked harder, they found otherwise. Most women(More)
Two new algorithms for Golomb ruler derivation were developed and are presented together with the previously published standard algorithm. One of the new algorithms was used to prove computationally the optimality of three rulers. Two of these were previously proven but yet unpublished, and the authors' independent derivation connrmed these results. The(More)
The tremendous growth in wireless LANs has generated interest in technologies that provide higher data rates and greater system capacities. The IEEE 802.11a [1] standard, based on coded OFDM modulation [2,3], provides nearly five times the data rate and as much as ten times the overall system capacity as current 802.11b wireless LAN systems. This paper(More)
Milk-borne insulin-like growth factors I and II (IGF-I and -II) may be of importance in the differentiation of the gastrointestinal tract of the suckling. To test this hypothesis, 10- to 11-d-old suckling rats were given via an orogastric tube 125I-IGF-I (n = 6) or 125I-IGF-II (n = 6) in rat milk and killed 30 min later. The results of this study(More)
Numerous interactions between malignant and stromal/inflammatory cells take place within solid human tumours, which are mediated, in part, by the release of signalling proteins called cytokines. In the present study, we have compared the secretion of two important immunomodulatory cytokines, IFN-gamma and IL-4 by individual, immunophenotyped NK cells(More)
BACKGROUND Insulin-like growth factors (IGF)-I and -II are present in milk of a number of mammalian species. The stability of IGF-I and -II in the intestinal lumen was investigated by measuring the proteolytic degradation of 125I-labeled IGF-I and IGF-II by rat (suckling and adult) intestinal luminal flushings in vitro. METHODS Degradation of 125I-labeled(More)
A 52 year old, never smoker presented to hospital with progressive shortness of breath and significant stridor over a five month period. He also described the feeling of needing to cough but being unable to expectorate. CT Thorax demonstrated a mass lesion in the trachea just distal to the larynx which was then confirmed on rigid bronchoscopy. Subsequent(More)