Mark Winslow

Learn More
Although silicon (Si) is found at much higher concentrations in healthy rice crops than N, P or K, it has received far less study, particularly for upland rice. There are few reports on the existence, causes, and effects of varying Si supplies in different environments. Chemical analyses of soil, water and plant tissue samples from experiments grown on a(More)
A software package, incorporating two computational patient phantoms, has been developed for optimizing X-ray radiographic imaging. A tomographic phantom, visible photographic Man tomographic phantom (VIP-Man), constructed from Visible Human anatomical color images is used to simulate the scattered portion of an X-ray system using the Electron Gamma Shower(More)
This study develops and demonstrates a realistic x-ray imaging simulator with computerized observers to maximize lesion detectability and minimize patient exposure. A software package, ViPRIS, incorporating two computational patient phantoms, has been developed for simulating x-ray radiographic images. A tomographic phantom, VIP-Man, constructed from(More)
The United Nations Convention to Combat Desertification and its sister conventions, the United Nations Framework Convention on Climate Change and the Convention on Biological Diversity, all aim to halt or mitigate the deterioration of the ecological processes on which life depends. Sustainable land management (SLM) is fundamental to achieving the goals of(More)
ICARDA and ICRISAT are nonproft international agricultural research centers supported by the Consultative Group on International Agricultural Research (CGIAR). They focus on sustainable agricultural development for the dryland poor. They also convene a global, multi-institutional partnership known as the Desertification, Drought, Poverty and Agriculture(More)
A male human tomographic model was used to calculate values of energy imparted (epsilon) and effective dose (E) for monoenergetic photons (30-150 keV) in radiographic examinations. Energy deposition in the organs and tissues of the human phantom were obtained using Monte Carlo simulations. Values of E/epsilon were obtained for three common projections(More)
Grain yield, dry-matter production, and susceptibility to grain discoloration syndrome of upland rice (Oryza sativa L.) in relation to nutrient supplies were studied in Ultisols in Nigeria's humid tropics. Nutrients identified as necessary to produce high dry matter were N, K, Mg, and Si. Among these nutrients, Mg and Si were found to be involved in the(More)
Coordinating Lead Authors: Uriel Safriel, Zafar Adeel Lead Authors: David Niemeijer, Juan Puigdefabregas, Robin White, Rattan Lal, Mark Winslow, Juliane Ziedler, Stephen Prince, Emma Archer, Caroline King Contributing Authors: Barry Shapiro, Konrad Wessels, Thomas Nielsen, Boris Portnov, Inbal Reshef, Jillian Thonell, Esther Lachman, Douglas McNab Review(More)
An overview of the current status of desertification monitoring and assessment in Argentina is presented. This explains the severity of the problem that affects 70% of the national territory and discusses the background of scientific national organizations engaged in the National Action Plan. A state-of-the-art review of predominant approaches and results(More)
  • 1