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Your search keyword '"Mitchell, P.D."' showing total 73 results
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73 results on '"Mitchell, P.D."'

2. Areawide suppression of European corn borer with Bt maize reaps savings to non-Bt maize growers

Author

Hutchison, W.D., Burkness, E.C., Mitchell, P.D., Moon, R.D., Leslie, T.W., Fleischer, S.J., Abrahamson, M., Hamilton, K.L., Steffey, K.L., Gray, M.E., Hellmich, R.L., Kaster, L.V., Hunt, T.E., Wright, R.J., Pecinovsky, K., Rabaey, T.L., Flood, B.R., and Raun, E.S.

Subjects
Corn industry -- Economic aspects, Corn industry -- Innovations, Corn -- Innovations, Corn -- Growth, Sustainable agriculture -- Management, Genetically modified crops -- Growth, Genetically modified crops -- Economic aspects, Company growth, Company business management, Science and technology
Abstract

Transgenic maize engineered to express insecticidal proteins from the bacterium Bacillus thuringiensis (Bt) has become widely adopted in U.S. agriculture. In 2009, Bt maize was planted on more than 22.2 million hectares, constituting 63% of the U.S. crop. Using statistical analysis of per capita growth rate estimates, we found that areawide suppression of the primary pest Ostrinia nubilalis (European corn borer) is associated with Bt maize use. Cumulative benefits over 14 years are an estimated $3.2 billion for maize growers in Illinois, Minnesota, and Wisconsin, with more than $2.4 billion of this total accruing to non-Bt maize growers. Comparable estimates for Iowa and Nebraska are $3.6 billion in total, with $1.9 billion for non-Bt maize growers. These results affirm theoretical predictions of pest population suppression and highlight economic incentives for growers to maintain non-Bt maize refugia for sustainable insect resistance management. 10.1126/science.1190242

Published
2010
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4. A phase Ib/II study (SCORES) of durvalumab (D) plus danvatirsen (DAN; AZD9150) or AZD5069 (CX2i) in advanced solid malignancies and recurrent/metastatic head and neck squamous cell carcinoma (RM-HNSCC): Updated results

Author

Cohen, E.E.W., primary, Harrington, K.J., additional, Hong, D.S., additional, Mesia, R., additional, Brana, I., additional, Perez Segura, P., additional, Wise-Draper, T., additional, Scott, M.L., additional, Mitchell, P.D., additional, Mugundu, G.M., additional, McCoon, P., additional, Cook, C.E., additional, Mehta, M., additional, and Keilholz, U., additional

Published
2018
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7. From the field: A participatory approach to assess labor inputs on organic diversified vegetable farms in the Upper Midwestern USA.

Author

Silva, E.M., Hendrickson, J., Mitchell, P.D., and Bietila, E.

Subjects
AGRICULTURAL diversification, CROPS, SEASONAL employment, LABOR, LABOR costs, VEGETABLE farming
Abstract

Consumer interest in locally grown produce continues to increase in the USA. Small, diversified vegetable farms, including those managed organically, have been important contributors to meet this growing demand for local product. To be profitable in these markets, farmers must be able to appropriately price their products to cover production costs and provide themselves and their employees a living wage. Questions remain, however, as to the most effective method of assessing the cost of production of specific crops on these farms, in part due to the variability in labor inputs associated with diversified farming strategies. This study used a participatory approach to investigate both methodologies for varied widely, with high coefficients of variation calculated for all values, indicating high farm-to-farm variability in labor required for seasonal activities. Farmers reported both challenges with data collection, as well as successes in using data analysis to guide management decisions. This ongoing work highlights the value of collecting farm-specific data for use in cost-of-production determinations. [ABSTRACT FROM AUTHOR]

Published
2019
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38. A receiver-based vertical handover mechanism for TCP congestion control.

Author

Yuci Gou, Pearce, D.A.J., and Mitchell, P.D.

Abstract

We propose and evaluate a vertical handover mechanism for TCP, based on receiver bandwidth delay product (BDP) measurement and congestion control using the receiver's advertised window. It addresses the negative impact of abrupt changes in link capacity and latency on TCP performance during make-before-break vertical handover in heterogeneous networks, enabling TCP to seamlessly adapt to new conditions. It resolves the problem of buffer overflow in a low capacity network on handover from a high capacity network, and the under-utilisation problem on handover in the reverse direction. All modifications are restricted to the mobile device, and the proposed technique is fully interoperable with existing TCP and mobile IP infrastructure. It maintains end-to-end semantics, supports IP security, and can be easily deployed [ABSTRACT FROM PUBLISHER]

Published
2006
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41. Weapon injuries in the crusader mass graves from a 13th century attack on the port city of Sidon (Lebanon)

Author

Mikulski, R.N.R., Schutkowski, H., Smith, M.J., Doumet-Serhal, C., Mitchell, P.D., Mikulski, R.N.R., Schutkowski, H., Smith, M.J., Doumet-Serhal, C., and Mitchell, P.D.

Abstract

Archaeological excavations close to St Louis’ castle in Sidon, Lebanon have revealed two mass grave deposits containing partially articulated and disarticulated human skeletal remains. A minimum of 25 male individuals have been recovered, with no females or young children. Radiocarbon dating of the human remains, a crusader coin, and the design of Frankish belt buckles strongly indicate they belong to a single event in the mid-13th century CE. The skeletal remains demonstrate a high prevalence of unhealed sharp force, penetrating force and blunt force trauma consistent with medieval weaponry. Higher numbers of wounds on the back of individuals than the front suggests some were attacked from behind, possibly as they fled. The concentration of blade wounds to the back of the neck of others would be compatible with execution by decapitation following their capture. Taphonomic changes indicate the skeletal remains were left exposed for some weeks prior to being collected together and re-deposited in the defensive ditch by a fortified gateway within the town wall. Charring on some bones provides evidence of burning of the bodies. The findings imply the systematic clearance of partially decomposed corpses following an attack on the city, where adult and teenage males died as a result of weapon related trauma. The skeletons date from the second half of the Crusader period, when Christian-held Sidon came under direct assault from both the Mamluk Sultanate (1253 CE) and the Ilkhanate Mongols (1260 CE). It is likely that those in the mass graves died during one of these assaults.

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