A faint field-galaxy redshift survey in quasar fields

Quasars serve as excellent markers for the identification of high-redshift galaxies and galaxy clusters. In past surveys, nearly 20 clusters of Abell richness class 1 or richer associated with quasars in the redshift range 0.2 less than z less than 0.8 were identified. In order to study these galaxy clusters in detail, a major redshift survey of faint galaxies in these fields using the CFHT LAMA/MARLIN multi-object spectroscopy system was carried out. An equally important product in such a survey is the redshifts of the field galaxies not associated with the quasars. Some preliminary results on field galaxies from an interim set of data from our redshift survey in quasar fields are presented

Relationship Between The Black Cocoa Ant, Dolichoderus Thoracicus Smith (Hymenoptera: Formicidae) and the Cocoa Pod Borer, Conopomorpha Cramerella Snellen(Lepidoptera: Gracillarlldae) in a Cocoa-Coconut Ecosystem

The relationship between the black cocoa ant Dolichoderus thoracicus Smith (Hymenoptera: Formicidae) and the cocoa pod borer Conopomorpha cramerella Snellen (Lepidoptera: Gracillariidae) was studied in a cocoa-coconut field. D. thoracicus was present in moderate to high abundance in the field at the beginning of the experiments. In one treatment, the D. thoracicus population was depressed with insecticides (ant-scarce plots) and was augmented in the other treatment by the provision of artificial nests and dried leaf shelters (ant-abundant plots). percentage of C. cramere/la infestation in ant-abundant plots was generally less than 50% while the reverse was true in ant-scarce plots. Even though there was no significant difference in the percentage of pods which were infested and extractable as well as partially extractable, the percentage of unextractable pods in ant-abundant plots was significantly lower than in ant-scarce plots, indicating that D. thoracicus reduced the severity of C. cramerella infestation. This difference was evident throughout the trial. Mammalian damage was also more pronounced in ant-scarce plots. In a survey of the relationship between D. thoracicus pod abundance and C. cramerella infestation conducted within and outside the trial area, the two were found to be negatively related. Pods within the trial plots also had less C. cramerella damage compared to those outside the trial plots, indicating a possible attrition effect. Pods from which D. thoracicus were deliberately excluded also had a higher incidence of infestation compared to pods on which D. thoracicus was enhanced. Moderate D. thoracicus abundance on pods was sufficient to prevent C. cramerella infestation. The mechanism of control was probably deterrence of C. cramere/la oviposition. This study shows that encouraging D. thoracicus is beneficial to cocoa as it reduces the damage of two major pests, C. cramerella and mammals

Multi-filter spectrophotometry of quasar environments

A many-filter photometric technique for determining redshifts and morphological types, by fitting spectral templates to spectral energy distributions, has good potential for application in surveys. Despite success in studies performed on simulated data, the results have not been fully reliable when applied to real, low signal-to-noise data. We are investigating techniques to improve the fitting process

Temperature-compensated fibre optic strain gauge

Inventor name used in this publication: Hwa Ywa TamInventor name used in this publication: Siu Lau HoUS7796844; US7796844 B2; US7796844B2; US7,796,844; US 7,796,844 B2; 7796844; Appl. No. 12/177,830Inventor name used in this publication: Shun Yee LiuUSVersion of Recor

Quantum bit commitment using Wheeler's delayed choice experiment

We construct a quantum bit commitment scheme using a double-slit setup similar to Wheeler's delayed choice experiment. Bob sends photons toward the double-slit, and Alice commits by determining either the slit from which each photon emerges (for $b=0$), or its landing position on a screen (for $b=1$). Since the photon's wave front expands at the speed of light, Alice cannot delay the detection indefinitely, or it would very soon be out of her control no matter how much resources she has.Comment: 6 pages, no figure. arXiv admin note: substantial text overlap with arXiv:0910.264

Surveillance and evaluation data resources for comprehensive tobacco control programs

1. National and state surveys and tools -- 2. Registries and vital statistics -- 3. Topic-specific tools: health systems and clinical settings -- 4. Topic-specific tools: sales data -- 5. Topic-specific tools: national, state, and local policy tracking -- 6. Topic-specific tools: pro-tobacco advertising and promotions -- 7. Topic-specific tools: advertising tracking and outcomes measurement -- 8. Topic-specific tools: communitySue Lin Yee, Michael Schooley."November 2001."Also available via the World Wide Web as Acrobat .pdf file (3.22 MB, 30 p.).Yee SL, Schooley M. Surveillance and Evaluation Data Resources for Comprehensive Tobacco Control Programs. Atlanta (GA): Centers for Disease Control and Prevention; 2001