A high speed CMOS correlator

A full custom, 25 MHz, 1.6 microns CMOS Correlator chip is presented. The 5.15mm by 4.23mm chip performs either autocorrelation or crosscorrelation, consuming less than 10mW per channel. The correlator, designed for a space borne spectrometer, contains 32 channels. The 24 bit accumulator registers can be read independent of the input data path, in either 8 bit bytes, or 16 bit words. The device is cascadable and allows integration periods of up to 1.78 seconds, at 25 Megasamples/second. The controllers, for the input data path and the data output section, are implemented with Sequence Invariant State Machines

Automated synthesis of sequence invariant state machines

A computer aided design (CAD) tool for the design of very large scale integration (VLSI) synchronous sequential controllers is presented. Both the design and layout of the state machine are automatically generated. The program is process independent allowing a choice of design rules to base generation upon. An incremental layout creation approach was implemented which makes the tool useful in a wide range of layout applications. Flow table descriptions are input to characterize the desired machine and a layout archive is output

Emergence of classicality in small number entangled systems

We show the transition from a fully quantized interaction to a semiclassical one in entangled small number quantum systems using the quantum trajectories approach. In particular, we simulate the microwave Ramsey zones used in Rydberg atom interferometry, filling in the gap between the strongly entangling Jaynes Cummings evolution and the semiclassical rotation of the atomic internal states. We also correlate the information flowing with leaking photons to the entanglement generation between cavity field and flying atom and detail the roles played by the strong dissipation and the external driving force in preserving atomic coherence through the interaction.Comment: 4 pages, 6 figure

Do comorbidities influence help-seeking for cancer alarm symptoms? A population-based survey in England

Background: We examined associations between different chronic morbidities and help-seeking for possible cancer symptoms. / Methods: Postal survey of individuals aged>50 years in England. Participants could report prior morbidities in respect of 12 pre-defined conditions. Among patients experiencing possible cancer symptoms we examined associations between specific morbidities and self-reported help-seeking (i.e. contacted versus not contacted a GP) for each alarm symptom using regression analyses. / Results: Among 2042 respondents (42% response rate), 936 (46%) recently experienced one of 14 possible cancer symptoms considered in our analysis. Of them, 80% reported one or more morbidities, most frequently hypertension/hypercholesterolemia (40%), osteomuscular (36%) and heart diseases (21%). After adjustment for socio-demographic characteristics, patients with hypertension/hypercholesterolemia were more likely to report help-seeking for possible cancer symptoms, such as unexplained cough (OR=2.0; 95%CI 1.1-3.5), pain (OR=2.2; 95%CI 1.0-4.5) and abdominal bloating (OR=2.3; 95%CI 1.1-4.8). Urinary morbidity was associated with increased help-seeking for abdominal bloating (OR=5.4; 95%CI 1.2-23.7) or rectal bleeding (OR=5.8; 95%CI 1.4-23.8). In contrast, heart problems reduced help-seeking for change in bowel habits (OR=0.4; 95%CI 0.2-1.0). / Conclusions: Comorbidities are common and may facilitate help-seeking for possible cancer symptoms, but associations vary for specific symptom-comorbidity pairs. The findings can contribute to the design of future cancer symptom awareness campaigns

Apollo experiment S-217 IR/radar study of Apollo data

An experiment using Earth based remote sensing radar, infrared eclipse, and color difference data to deduce surface properties not visible in Apollo photography is reported. The Earth based data provided information on the small scale (centimeter sized) blockiness and on the surface chemical composition (titanium and iron contents) of the lunar surface. These deduced surface properties complemented the new Apollo photography, leading to refined geologic interpretations of the lunar surface

Fractional Quantum Hall Effect and vortex lattices

It is demonstrated that all observed fractions at moderate Landau level fillings for the quantum Hall effect can be obtained without recourse to the phenomenological concept of composite fermions. The possibility to have the special topologically nontrivial many-electron wave functions is considered. Their group classification indicates the special values of of electron density in the ground states separated by a gap from excited states

Relationship Between Self-Report and Observed Parenting Among Parents in Treatment Versus Not in Treatment Populations

Background: Most maltreatment, by definition, is a failure of parenting. However, even without maltreatment, poor parenting can lead to a variety of negative outcomes including social, emotional and behavioral problems. Given that parenting plays a key role in child outcomes, one of the foci of interventions are parenting programs. Interventions for parents must be evaluated using standardized assessment tools, which leads to an important question; how can we best assess parenting? Observational methods (observing a parent and child interact) are often regarded as the gold standard in the assessment of parental behaviors but are cumbersome to administer. Self-reports of parenting behaviors are the most commonly used measure due to ease of administration, but their validity may be questioned. The goal of this study is to examine the relationship between three observational measures of parenting and two self-report measures. Methods: Participants (n=133) were either parents who were receiving treatment at Metro-Atlanta drug courts or other caregivers. All participants completed self-report measures of parenting, and videotaped interaction task with a child. Videos were coded for a variety of behaviors, and two of those behaviors (affection and involvement) matched constructs that parents reported on in a self-report battery. Results: Correlations between self- report and observational measures for the constructs affection and involvement for the whole sample ranged from r = -.03 to.06 for affection, and r = -.05 to .08 for involvement, but none were statistically significant. The relationship between self-report and observed parenting by adult type and child age was also examined. However, none of the correlations were statistically significant. Conclusions: Although there were no significant correlations found between self-report and observational measures, existing research suggests that self-reports are not interchangeable with observational methods. In future studies, constructs used to compare self-reports and observational methods should examine how each relates to the outcomes. Furthermore, CAIC (observational tool) should also be examined in further detail. Keywords: Observation methods, self-report methods, parenting, behaviors: warmth and involvement, coerced population, non-coerced population, child ag

Breastfeeding, breast milk and viruses

<p>Abstract</p> <p>Background</p> <p>There is seemingly consistent and compelling evidence that there is no association between breastfeeding and breast cancer. An assumption follows that milk borne viruses cannot be associated with human breast cancer.</p> <p>We challenge this evidence because past breastfeeding studies did not determine "exposure" of newborn infants to colostrum and breast milk.</p> <p>Methods</p> <p>We conducted a prospective review of 100 consecutive births of infants in the same centre to determine the proportion of newborn infants who were "exposed" to colostrum or breast milk, as distinct from being fully breast fed. We also report a review of the breastfeeding practices of mothers of over 87,000 newborn infants in the Australian State of New South Wales.</p> <p>This study was approved by the Human Research Ethics Committee of the University of New South Wales (Sydney, Australia). Approval 05063, 29 September 2005.</p> <p>Results</p> <p>Virtually all (97 of 100) newborn infants in this centre were "exposed" to colostrum or breast milk whether or not they were fully breast fed. Between 82.2% to 98.7% of 87,000 newborn infants were "exposed" to colostrum or breast milk.</p> <p>Conclusion</p> <p>In some Western communities there is near universal exposure of new born infants to colostrum and breast milk. Accordingly it is possible for the transmission of human milk borne viruses. This is contrary to the widespread assumption that human milk borne viruses cannot be associated with breast cancer.</p

Reduced tillage in corn production

Caption title."Corn Belt Branch, Soil and Water Conservation Research Division, Agricultural Research Service, U.S. Department of Agriculture, Columbia, Missouri and the Agricultural Engineering Department of the Missouri Agricultural Experiment Station Cooperating"--Page [2]