Browsing by Author "Walker, S."
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- CALIS - A CALibration Insertion System for the DarkSide-50 dark matter search experimentAgnes, P.; Albuquerque, I. F. M.; Alexander, T.; Alton, A. K.; Asner, D. M.; Back, H. O.; Baldin, B.; Biery, K.; Bocci, V.; Bonfini, G.; Bonivento, W.; Bossa, M.; Bottino, B.; Brigatti, A.; Brodsky, J.; Budano, F.; Bussino, S.; Cadeddu, M.; Cadonati, L.; Cadoni, M.; Calaprice, F.; Canci, N.; Candela, A.; Caravati, M.; Cariello, M.; Carlini, M.; Catalanotti, S.; Cavalcante, P.; Chepurnov, A.; Cicalo, C.; Cocco, A. G.; Covone, G.; D'Angelo, D.; D'Incecco, M.; Davini, S.; De Cecco, S.; De Deo, M.; De Vincenzi, M.; Derbin, A. V.; Devoto, A.; Di Eusanio, F.; Di Pietro, G.; Dionisi, C.; Edkins, E.; Empl, A.; Fan, A.; Fiorillo, G.; Fomenko, K.; Forster, G.; Franco, D.; Gabriele, Federico; Galbiati, C.; Giagu, S.; Giganti, C.; Giovanetti, G. K.; Goretti, A. M.; Granato, F.; Grandi, L.; Gromov, M.; Guan, M.; Guardincerri, Y.; Hackett, B. R.; Herner, K.; Hughes, D.; Humble, P.; Hungerford, Ed V.; Ianni, A.; Ianni, A.; James, I.; Johnson, T. N.; Jollet, C.; Keeter, K.; Kendziora, C. L.; Koh, G.; Korablev, D.; Korga, G.; Kubankin, A.; Li, X.; Lissia, M.; Loer, B.; Lombardi, Paolo; Longo, G.; Ma, Y.; Machado, A. A.; Machulin, I. N.; Mandarano, A.; Mari, S. M.; Maricic, Jelena; Marini, L.; Martoff, C. J.; Meregaglia, A.; Meyers, P. D.; Milincic, R.; Miller, J. D.; Montanari, D.; Monte, A.; Mount, B. J.; Muratova, V. N.; Musico, P.; Napolitano, J.; Agasson, A. Navrer; Odrowski, S.; Orsini, M.; Ortica, F.; Pagani, L.; Pallavicini, M.; Pantic, E.; Parmeggiano, S.; Pelczar, K.; Pelliccia, N.; Pocar, A.; Pordes, S.; Pugachev, D. A.; Qian, H.; Randle, K.; Ranucci, G.; Razeti, M.; Razeto, A.; Reinhold, B.; Renshaw, A. L.; Rescigno, M.; Riffard, Q.; Romani, A.; Rossi, B.; Rossi, Nicola; Rountree, D.; Sablone, D.; Saggese, P.; Saldanha, R.; Sands, W.; Savarese, C.; Schlitzer, B.; Segreto, E.; Semenov, D. A.; Shields, E.; Singh, P. N.; Skorokhvatov, Mikhail D.; Smirnov, O. Y.; Sotnikov, A.; Stanford, C.; Suvorov, Yura; Tartaglia, R.; Tatarowicz, J.; Testera, G.; Tonazzo, A.; Trinchese, P.; Unzhakov, E. V.; Verducci, M.; Vishneva, A.; Vogelaar, R. Bruce; Wada, M.; Walker, S.; Wang, H.; Wang, Y.; Watson, A. W.; Westerdale, S.; Wilhelmi, J.; Wojcik, M. M.; Xiang, Xi.; Xiao, X.; Xu, J.; Yang, C.; Zec, A.; Zhong, W.; Zhu, C.; Zuzel, G. (2017-12)This paper describes the design, fabrication, commissioning and use of a CALibration source Insertion System (CALIS) in the DarkSide-50 direct dark matter search experiment. CALIS deploys radioactive sources into the liquid scintillator veto to characterize the detector response and detection efficiency of the DarkSide-50 Liquid Argon Time Projection Chamber, and the surrounding 30 t organic liquid scintillator neutron veto. It was commissioned in September 2014 and has been used successfully in several gamma and neutron source campaigns since then. A description of the hardware and an excerpt of calibration analysis results are given below.
- Evaluación de GLEAMS en parcelas de papa para el manejo de nutrientes agrícola en la zona central andina de BoliviaWalker, S.; Heatwole, Conrad D.; Cossio, J. (Cochabamba, Bolivia: Revista de Agricultura, 2011)Este estudio se enfoco en el uso del modelo GLEAMS para representar la dinámica de nutrientes de los sistemas de cultivo de la cuenca Jatun Mayu, así como evaluar la idoneidad de este modelo como herramienta para la evaluar la fertilización y las prácticas del sistema de cultivos de la cuenca. Este estudio se realizo en la comunidad de Villa Flores, donde se trabajo con nueve parcelas experimentales. Asimismo se realizo un muestreo del suelo para obtener las propiedades físicas y químicas. El modelo fue validado mediante el uso de resultados observados y simulados. La conclusión general de este estudio es que una mejor representación del componente de mineralización del contenido de N potencialmente mineralizable del suelo debe ser completado y verificado antes de usar el modelo de GLEAMS.
- Model for field-scale analysis of nutrient management in potato production systems in Tiraque, BoliviaWalker, S. (Blacksburg, VA: Office of International Research, Education, and Development, Virginia Tech, 2009)This brief presentation summarizes SANREM CRSP research on watershed modeling for increased efficiency in potato farming in the Bolivian highlands.
- The Sciences and Art of Adaptive Management: Innovating for Sustainable Agriculture and Natural Resource ManagementMoore, K. M. (ed.) (Ankeny, IA: Soil and Water Conservation Society, 2009)In this book, various authors describe their expertise and each explains a different aspect of adaptive management. This collective work offers a detailed breakdown of the nested landscape system, related case studies, and successful solutions for land management practices.
- Watershed-based systemsWalker, S.; Mostaghimi, Saied (Ankeny, IA: Soil and Water Conservation Society, 2009)This chapter discusses the application of adaptive watershed management strategies and their importance to maintaining water supply. The watershed, which is an area of land that drains to a particular point or outlet, can be any size and is physically governed by topography. Thoroughly understanding these physical properties is essential to formulating an effective management plan for a watershed. In turn, proper management can improve and maintain soil quality and water availability in communities across the watershed. This chapter offers definitions, case studies and an organization framework for collecting data and analyzing the results, which are essential for formulating a watershed management plan.