Browsing by Department "University of Texas at Austin"

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Effective modeling for Integrated Water Resource Management : A guide to contextual practices by phases and steps and future opportunities
(2019-06-01) Badham, Jennifer; Elsawah, Sondoss; Guillaume, Joseph H.A.; Hamilton, Serena H.; Hunt, Randall J.; Jakeman, Anthony J.; Pierce, Suzanne A.; Snow, Valerie O.; Babbar-Sebens, Meghna; Fu, Baihua; Gober, Patricia; Hill, Mary C.; Iwanaga, Takuya; Loucks, Daniel P.; Merritt, Wendy S.; Peckham, Scott D.; Richmond, Amy K.; Zare, Fateme; Ames, Daniel; Bammer, Gabriele
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
The effectiveness of Integrated Water Resource Management (IWRM) modeling hinges on the quality of practices employed through the process, starting from early problem definition all the way through to using the model in a way that serves its intended purpose. The adoption and implementation of effective modeling practices need to be guided by a practical understanding of the variety of decisions that modelers make, and the information considered in making these choices. There is still limited documented knowledge on the modeling workflow, and the role of contextual factors in determining this workflow and which practices to employ. This paper attempts to contribute to this knowledge gap by providing systematic guidance of the modeling practices through the phases (Planning, Development, Application, and Perpetuation) and steps that comprise the modeling process, positing questions that should be addressed. Practice-focused guidance helps explain the detailed process of conducting IWRM modeling, including the role of contextual factors in shaping practices. We draw on findings from literature and the authors’ collective experience to articulate what and how contextual factors play out in employing those practices. In order to accelerate our learning about how to improve IWRM modeling, the paper concludes with five key areas for future practice-related research: knowledge sharing, overcoming data limitations, informed stakeholder involvement, social equity and uncertainty management.
Overview of ASDEX Upgrade results
(2017-10) Aguiam, D.; Aho-Mantila, L.; Angioni, C.; Arden, N.; Parra, R. Arredondo; Asunta, O.; de Baar, M.; Balden, M.; Behler, K.; Bergmann, A.; Bernardo, J.; Bernert, M.; Beurskens, M.; Biancalani, A.; Bilato, R.; Birkenmeier, G.; Bobkov, V.; Bock, A.; Bogomolov, A.; Bolzonella, T.; Boeswirth, B.; Bottereau, C.; Bottino, A.; van den Brand, H.; Brezinsek, S.; Brida, D.; Brochard, F.; Bruhn, C.; Buchanan, J.; Buhler, A.; Burckhart, A.; Cambon-Silva, D.; Camenen, Y.; Carvalho, P.; Carrasco, G.; Cazzaniga, C.; Carr, M.; Carralero, D.; Casali, L.; Castaldo, C.; Cavedon, M.; Challis, C.; Chankin, A.; Chapman, I.; Clairet, F.; Classen, I.; Coda, S.; Coelho, R.; Coenen, J. W.; Colas, L.; Conway, G.; Costea, S.; Coster, D. P.; Croci, G.; Cseh, G.; Czarnecka, A.; D'Arcangelo, O.; Day, C.; Delogu, R.; de Marne, P.; Denk, S.; Denner, P.; Dibon, M.; D'Inca, R.; Di Siena, A.; Douai, D.; Drenik, A.; Drube, R.; Dunne, M.; Duval, B. P.; Dux, R.; Eich, T.; Elgeti, S.; Engelhardt, K.; Erdos, B.; Erofeev, I.; Esposito, B.; Fable, E.; Faitsch, M.; Fantz, U.; Faugel, H.; Felici, F.; Fietz, S.; Figueredo, A.; Fischer, R.; Ford, O.; Frassinetti, L.; Freethy, S.; Froeschle, M.; Fuchert, G.; Fuchs, J. C.; Fuenfgelder, H.; Galazka, K.; Galdon-Quiroga, J.; Gallo, A.; Gao, Y.; Garavaglia, S.; Garcia-Munoz, M.; Geiger, B.; Cianfarani, C.; Giannone, L.; Giovannozzi, E.; Gleason-Gonzalez, C.; Gloeggler, S.; Gobbin, M.; Goerler, T.; Goodman, T.; Gorini, G.; Gradic, D.; Graeter, A.; Granucci, G.; Greuner, H.; Griener, M.; Groth, M.; Gude, A.; Guenter, S.; Guimarais, L.; Haas, G.; Hakola, A. H.; Ham, C.; Happel, T.; Harrison, J.; Hatch, D.; Hauer, V.; Hayward, T.; Heinemann, B.; Heinzel, S.; Hellsten, T.; Henderson, S.; Hennequin, P.; Herrmann, A.; Heyn, E.; Hitzler, F.; Hobirk, J.; Hoelzl, M.; Hoeschen, T.; Holm, J. H.; Hopf, C.; Hoppe, F.; Horvath, L.; Houben, A.; Huber, A.; Igochine, V.; Ilkei, T.; Ivanova-Stanik, I.; Jacob, W.; Jacobsen, A. S.; Jacquot, J.; Janky, F.; Jardin, A.; Jaulmes, F.; Jenko, F.; Jensen, T.; Joffrin, E.; Kaesemann, C.; Kallenbach, A.; Kalvin, S.; Kantor, M.; Kappatou, A.; Kardaun, O.; Karhunen, J.; Kasilov, S.; Kernbichler, W.; Kim, D.; Kimmig, S.; Kirk, A.; Klingshirn, H. -J.; Koch, F.; Kocsis, G.; Koehn, A.; Kraus, M.; Krieger, K.; Krivska, A.; Kraemr-Flecken, A.; Kurki-Suonio, T.; Kurzan, B.; Lackner, K.; Laggner, F.; Lang, P. T.; Lauber, P.; Lazanyi, N.; Lazaros, A.; Lebschy, A.; Li, L.; Li, M.; Liang, Y.; Lipschultz, B.; Liu, Y.; Lohs, A.; Luhmann, N. C.; Lunt, T.; Lyssoivan, A.; Madsen, J.; Maier, H.; Maj, O.; Mailloux, J.; Maljaars, E.; Manas, P.; Mancini, A.; Manhard, A.; Manso, M. -E.; Mantica, P.; Mantsinen, M.; Manz, P.; Maraschek, M.; Martens, C.; Martin, P.; Marrelli, L.; Martitsch, A.; Mastrostefano, S.; Mayer, A.; Mayer, M.; Mazon, D.; McCarthy, P. J.; McDermott, R.; Meisl, G.; Meister, H.; Medvedeva, A.; Merkel, P.; Merkel, R.; Merle, A.; Mertens, V.; Meshcheriakov, D.; Meyer, H.; Meyer, O.; Miettunen, J.; Milanesio, D.; Mink, F.; Mlynek, A.; Monaco, F.; Moon, C.; Nazikian, R.; Nemes-Czopf, A.; Neu, G.; Neu, R.; Nielsen, A. H.; Nielsen, S. K.; Nikolaeva, V.; Nocente, M.; Noterdaeme, J. -M.; Nowak, S.; Oberkofler, M.; Oberparleiter, M.; Ochoukov, R.; Odstrcil, T.; Olsen, J.; Orain, F.; Palermo, F.; Papp, G.; Perez, I. Paradela; Pautasso, G.; Enzel, F.; Petersson, P.; Pinzon, J.; Piovesan, P.; Piron, C.; Plaum, B.; Ploeckl, B.; Plyusnin, V.; Pokol, G.; Poli, E.; Porte, L.; Potzel, S.; Prisiazhniuk, D.; Puetterich, T.; Ramisch, M.; Rapson, C.; Rasmussen, J.; Raupp, G.; Refy, D.; Reich, M.; Reimold, F.; Ribeiro, T.; Riedl, R.; Rittich, D.; Rocchi, G.; Rodriguez-Ramos, M.; Rohde, V.; Ross, A.; Rott, M.; Rubel, M.; Ryan, D.; Ryter, F.; Saarelma, S.; Salewski, M.; Salmi, A.; Sanchis-Sanchez, L.; Santos, G.; Santos, J.; Sauter, O.; Scarabosio, A.; Schall, G.; Schmid, K.; Schmitz, O.; Schneider, P. A.; Schneller, M.; Schrittwieser, R.; Schubert, M.; Schwarz-Selinger, T.; Schweinzer, J.; Scott, B.; Sehmer, T.; Sertoli, M.; Shabbir, A.; Shalpegin, A.; Shao, L.; Sharapov, S.; Siccinio, M.; Sieglin, B.; Sigalov, A.; Silva, A.; Silva, C.; Simon, P.; Simpson, J.; Snicker, A.; Sommariva, C.; Sozzi, C.; Spolaore, M.; Stejner, M.; Stober, J.; Stobbe, F.; Stroth, U.; Strumberger, E.; Suarez, G.; Sugiyama, K.; Sun, H. -J.; Suttrop, W.; Szepesi, T.; Tal, B.; Tala, T.; Tardini, G.; Tardocchi, M.; Terranova, D.; Tierens, W.; Told, D.; Tudisco, O.; Trevisan, G.; Treutterer, W.; Trier, E.; Tripsky, M.; Valisa, M.; Valovic, M.; Vanovac, B.; Varela, P.; Varoutis, S.; Verdoolaege, G.; Vezinet, D.; Vianello, N.; Vicente, J.; Vierle, T.; Viezzer, E.; von Toussaint, U.; Wagner, D.; Wang, N.; Wang, X.; Weidl, M.; Weiland, M.; White, A. E.; Willensdorfer, M.; Wiringer, B.; Wischmeier, M.; Wolf, R.; Wolfrum, E.; Xiang, L.; Yang, Q.; Yang, Z.; Yu, Q.; Zagorski, R.; Zammuto, I.; Zarzoso, D.; Zhang, W.; van Zeeland, M.; Zehetbauer, T.; Zilker, M.; Zoletnik, S.; Zohm, H.
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
The ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design. Since 2015, AUG is equipped with a new pair of 3-strap ICRF antennas, which were designed for a reduction of tungsten release during ICRF operation. As predicted, a factor two reduction on the ICRF-induced W plasma content could be achieved by the reduction of the sheath voltage at the antenna limiters via the compensation of the image currents of the central and side straps in the antenna frame. There are two main operational scenario lines in AUG. Experiments with low collisionality, which comprise current drive, ELM mitigation/suppression and fast ion physics, are mainly done with freshly boronized walls to reduce the tungsten influx at these high edge temperature conditions. Full ELM suppression and non-inductive operation up to a plasma current of I-p = 0.8 MA could be obtained at low plasma density. Plasma exhaust is studied under conditions of high neutral divertor pressure and separatrix electron density, where a fresh boronization is not required. Substantial progress could be achieved for the understanding of the confinement degradation by strong D puffing and the improvement with nitrogen or carbon seeding. Inward/outward shifts of the electron density profile relative to the temperature profile effect the edge stability via the pressure profile changes and lead to improved/decreased pedestal performance. Seeding and D gas puffing are found to effect the core fueling via changes in a region of high density on the high field side (HFSHD). The integration of all above mentioned operational scenarios will be feasible and naturally obtained in a large device where the edge is more opaque for neutrals and higher plasma temperatures provide a lower collisionality. The combination of exhaust control with pellet fueling has been successfully demonstrated. High divertor enrichment values of nitrogen E-N >= 10 have been obtained during pellet injection, which is a prerequisite for the simultaneous achievement of good core plasma purity and high divertor radiation levels. Impurity accumulation observed in the all-metal AUG device caused by the strong neoclassical inward transport of tungsten in the pedestal is expected to be relieved by the higher neoclassical temperature screening in larger devices.
Writing resistance together
(2020-07-01) Ahonen, Pasi; Blomberg, Annika; Doerr, Katherine; Einola, Katja; Elkina, Anna; Gao, Grace; Hambleton, Jennifer; Helin, Jenny; Huopalainen, Astrid; Johannsen, Bjørn Friis; Johansson, Janet; Jääskeläinen, Pauliina; Kaasila-Pakanen, Anna Liisa; Kivinen, Nina; Mandalaki, Emmanouela; Meriläinen, Susan; Pullen, Alison; Salmela, Tarja; Satama, Suvi; Tienari, Janne; Wickström, Alice; Zhang, Ling Eleanor
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This piece of writing is a joint initiative by the participants in the Gender, Work and Organization writing workshop organized in Helsinki, Finland, in June 2019. This is a particular form of writing differently. We engage in collective writing and embody what it means to write resistance to established academic practices and conventions together. This is a form of emancipatory initiative where we care for each other as writers and as human beings. There are many author voices and we aim to keep the text open and dialogical. As such, this piece of writing is about suppressed thoughts and feelings that our collective picket line allows us to express. In order to maintain the open-ended nature of the text, and perhaps also to retain some ‘dirtiness’ that is essential to writing, the article has not been language checked throughout by a native speaker of English.