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2012

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Frog In The Pan: Continuous Information And Momentum, Zhi Da, G. Gurun, Mitchell Craig Warachka Jan 2012

Frog In The Pan: Continuous Information And Momentum, Zhi Da, G. Gurun, Mitchell Craig Warachka

Research Collection Lee Kong Chian School Of Business

We develop and test a frog-in-the-pan hypothesis that predicts investors are less attentive to information arriving continuously in small amounts than to information with the same cumulative stock price implications arriving in large amounts at discrete timepoints. Intuitively, we hypothesize that a series of gradual frequent changes attracts less attention than infrequent dramatic changes. Consistent with our frog-in-the-pan hypothesis, we find strong evidence that continuous information induces stronger and more persistent return continuation. Over a six-month holding period, momentum decreases monotonically from 8.86% for stocks with continuous information during their formation period to 2.91% for stocks with discrete information. Higher …

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Community-Level Response Of Coastal Microbial Biofilms To Ocean Acidification In A Natural Carbon Dioxide Vent Ecosystem., Ian Lidbury, Vivienne Johnson, Jason M. Hall-Spencer, Colin B. Munn, Michael Cunliffe Jan 2012

Community-Level Response Of Coastal Microbial Biofilms To Ocean Acidification In A Natural Carbon Dioxide Vent Ecosystem., Ian Lidbury, Vivienne Johnson, Jason M. Hall-Spencer, Colin B. Munn, Michael Cunliffe

School of Biological and Marine Sciences

The impacts of ocean acidification on coastal biofilms are poorly understood. Carbon dioxide vent areas provide an opportunity to make predictions about the impacts of ocean acidification. We compared biofilms that colonised glass slides in areas exposed to ambient and elevated levels of pCO(2) along a coastal pH gradient, with biofilms grown at ambient and reduced light levels. Biofilm production was highest under ambient light levels, but under both light regimes biofilm production was enhanced in seawater with high pCO(2). Uronic acids are a component of biofilms and increased significantly with high pCO(2). Bacteria and Eukarya denaturing gradient gel electrophoresis …

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Ocean Acidification And The Loss Of Phenolic Substances In Marine Plants., Thomas Arnold, Christopher Mealey, Hannah Leahey, A. Whitman Miller, Jason M. Hall-Spencer, Marco Milazzo, Kelly Maers Jan 2012

Ocean Acidification And The Loss Of Phenolic Substances In Marine Plants., Thomas Arnold, Christopher Mealey, Hannah Leahey, A. Whitman Miller, Jason M. Hall-Spencer, Marco Milazzo, Kelly Maers

School of Biological and Marine Sciences

Rising atmospheric CO(2) often triggers the production of plant phenolics, including many that serve as herbivore deterrents, digestion reducers, antimicrobials, or ultraviolet sunscreens. Such responses are predicted by popular models of plant defense, especially resource availability models which link carbon availability to phenolic biosynthesis. CO(2) availability is also increasing in the oceans, where anthropogenic emissions cause ocean acidification, decreasing seawater pH and shifting the carbonate system towards further CO(2) enrichment. Such conditions tend to increase seagrass productivity but may also increase rates of grazing on these marine plants. Here we show that high CO(2) / low pH conditions of OA …

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Global Habitat Suitability Of Cold-Water Octocorals, Chris Yesson, Michelle L. Taylor, Derek P. Tittensor, Andrew J. Davies, John Guinotte, Amy Baco, Julie Black, Jason M. Hall-Spencer, Alex D. Rogers Jan 2012

Global Habitat Suitability Of Cold-Water Octocorals, Chris Yesson, Michelle L. Taylor, Derek P. Tittensor, Andrew J. Davies, John Guinotte, Amy Baco, Julie Black, Jason M. Hall-Spencer, Alex D. Rogers

School of Biological and Marine Sciences

No abstract provided.

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Sea Anemones May Thrive In A High Co2 World, David J. Suggett, Jason M. Hall-Spencer, Riccardo Rodolfo-Metalpa, Toby G. Boatman, Ross Payton, Dt Pettay, Vivienne R. Johnson, Mark E. Warner, Tracy Lawson Jan 2012

Sea Anemones May Thrive In A High Co2 World, David J. Suggett, Jason M. Hall-Spencer, Riccardo Rodolfo-Metalpa, Toby G. Boatman, Ross Payton, Dt Pettay, Vivienne R. Johnson, Mark E. Warner, Tracy Lawson

School of Biological and Marine Sciences

No abstract provided.

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The Production Of Cauliflower Microshoots Using Curd Meristematic Tissues And Hypocotyl–Derived Callus., Hz Rihan, M Al-Shamari, Mp Fuller Jan 2012

The Production Of Cauliflower Microshoots Using Curd Meristematic Tissues And Hypocotyl–Derived Callus., Hz Rihan, M Al-Shamari, Mp Fuller

School of Biological and Marine Sciences

The capacity for microshoot production from cauliflower was investigated applying two different protocols. In the first, cauliflower curd meristematic tissue was used as a source of explants. The meristematic layer was shaved off and the clusters produced were homogenised using a commercial blender. In terms of its effect on the number and viability of microshoots, the use of 30 s blending duration treatment was found to be optimal between several treatments tested in the range 15 to 120 sec. Explants were cultivated in agitated S23 (MS (Murashige and Skoog, 1962) + 3 % sucrose) liquid media supplemented with different combinations …

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Order-Picking By Cellular Bucket Brigades: A Case Study, Yun Fong Lim Jan 2012

Order-Picking By Cellular Bucket Brigades: A Case Study, Yun Fong Lim

Research Collection Lee Kong Chian School Of Business

Assigning products to and retrieving them from proper storage locations are crucial in minimizing the operating cost of a unit-load warehouse. The problem becomes intractable when the warehouse faces variable supply and uncertain demand in a multi-period setting. We assume a factor-based demand model in which demand for each product in each period is affinely dependent on some uncertain factors. The distributions of these factors are only partially characterized. We introduce a robust optimization model that minimizes the worst-case expected total travel in the warehouse with distributional ambiguity of demand. Under a linear decision rule, we obtain a storage and …

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