[{"quality_controlled":0,"year":"2006","day":"01","date_created":"2018-12-11T11:57:37Z","publist_id":"4495","issue":"2","publisher":"Springer","extern":1,"abstract":[{"text":"We show, with an elementary proof, that the number of halving simplices in a set of n points in 4 in general position is O(n4-2/45). This improves the previous bound of O(n4-1/134). Our main new ingredient is a bound on the maximum number of halving simplices intersecting a fixed 2-plane. ","lang":"eng"}],"intvolume":"        35","_id":"2429","type":"journal_article","title":"K-sets in four dimensions","author":[{"first_name":"Jiří","last_name":"Matoušek","full_name":"Matoušek, Jiří"},{"full_name":"Sharir, Micha","last_name":"Sharir","first_name":"Micha"},{"full_name":"Smorodinsky, Shakhar","first_name":"Shakhar","last_name":"Smorodinsky"},{"last_name":"Wagner","first_name":"Uli","id":"36690CA2-F248-11E8-B48F-1D18A9856A87","full_name":"Uli Wagner","orcid":"0000-0002-1494-0568"}],"status":"public","publication_status":"published","date_published":"2006-02-01T00:00:00Z","publication":"Discrete & Computational Geometry","doi":"10.1007/s00454-005-1200-4","page":"177 - 191","date_updated":"2021-01-12T06:57:26Z","volume":35,"month":"02","citation":{"ieee":"J. Matoušek, M. Sharir, S. Smorodinsky, and U. Wagner, “K-sets in four dimensions,” <i>Discrete &#38; Computational Geometry</i>, vol. 35, no. 2. Springer, pp. 177–191, 2006.","chicago":"Matoušek, Jiří, Micha Sharir, Shakhar Smorodinsky, and Uli Wagner. “K-Sets in Four Dimensions.” <i>Discrete &#38; Computational Geometry</i>. Springer, 2006. <a href=\"https://doi.org/10.1007/s00454-005-1200-4\">https://doi.org/10.1007/s00454-005-1200-4</a>.","apa":"Matoušek, J., Sharir, M., Smorodinsky, S., &#38; Wagner, U. (2006). K-sets in four dimensions. <i>Discrete &#38; Computational Geometry</i>. Springer. <a href=\"https://doi.org/10.1007/s00454-005-1200-4\">https://doi.org/10.1007/s00454-005-1200-4</a>","short":"J. Matoušek, M. Sharir, S. Smorodinsky, U. Wagner, Discrete &#38; Computational Geometry 35 (2006) 177–191.","ista":"Matoušek J, Sharir M, Smorodinsky S, Wagner U. 2006. K-sets in four dimensions. Discrete &#38; Computational Geometry. 35(2), 177–191.","ama":"Matoušek J, Sharir M, Smorodinsky S, Wagner U. K-sets in four dimensions. <i>Discrete &#38; Computational Geometry</i>. 2006;35(2):177-191. doi:<a href=\"https://doi.org/10.1007/s00454-005-1200-4\">10.1007/s00454-005-1200-4</a>","mla":"Matoušek, Jiří, et al. “K-Sets in Four Dimensions.” <i>Discrete &#38; Computational Geometry</i>, vol. 35, no. 2, Springer, 2006, pp. 177–91, doi:<a href=\"https://doi.org/10.1007/s00454-005-1200-4\">10.1007/s00454-005-1200-4</a>."}},{"citation":{"short":"K. Chent, A. Fiat, H. Kaplan, M. Levy, J. Matoušek, E. Mossel, J. Pach, M. Sharir, S. Smorodinsky, U. Wagner, E. Welzl, SIAM Journal on Computing 36 (2006) 1342–1359.","ista":"Chent K, Fiat A, Kaplan H, Levy M, Matoušek J, Mossel E, Pach J, Sharir M, Smorodinsky S, Wagner U, Welzl E. 2006. Online conflict-free coloring for intervals. SIAM Journal on Computing. 36(5), 1342–1359.","apa":"Chent, K., Fiat, A., Kaplan, H., Levy, M., Matoušek, J., Mossel, E., … Welzl, E. (2006). Online conflict-free coloring for intervals. <i>SIAM Journal on Computing</i>. SIAM. <a href=\"https://doi.org/10.1137/S0097539704446682\">https://doi.org/10.1137/S0097539704446682</a>","chicago":"Chent, Ke, Amos Fiat, Haim Kaplan, Meital Levy, Jiří Matoušek, Elchanan Mossel, János Pach, et al. “Online Conflict-Free Coloring for Intervals.” <i>SIAM Journal on Computing</i>. SIAM, 2006. <a href=\"https://doi.org/10.1137/S0097539704446682\">https://doi.org/10.1137/S0097539704446682</a>.","ieee":"K. Chent <i>et al.</i>, “Online conflict-free coloring for intervals,” <i>SIAM Journal on Computing</i>, vol. 36, no. 5. SIAM, pp. 1342–1359, 2006.","mla":"Chent, Ke, et al. “Online Conflict-Free Coloring for Intervals.” <i>SIAM Journal on Computing</i>, vol. 36, no. 5, SIAM, 2006, pp. 1342–59, doi:<a href=\"https://doi.org/10.1137/S0097539704446682\">10.1137/S0097539704446682</a>.","ama":"Chent K, Fiat A, Kaplan H, et al. Online conflict-free coloring for intervals. <i>SIAM Journal on Computing</i>. 2006;36(5):1342-1359. doi:<a href=\"https://doi.org/10.1137/S0097539704446682\">10.1137/S0097539704446682</a>"},"month":"01","volume":36,"page":"1342 - 1359","date_updated":"2021-01-12T06:57:26Z","doi":"10.1137/S0097539704446682","publication":"SIAM Journal on Computing","publication_status":"published","date_published":"2006-01-01T00:00:00Z","author":[{"last_name":"Chent","first_name":"Ke","full_name":"Chent, Ke"},{"first_name":"Amos","last_name":"Fiat","full_name":"Fiat, Amos"},{"full_name":"Kaplan, Haim","last_name":"Kaplan","first_name":"Haim"},{"last_name":"Levy","first_name":"Meital","full_name":"Levy, Meital B"},{"full_name":"Matoušek, Jiří","first_name":"Jiří","last_name":"Matoušek"},{"full_name":"Mossel, Elchanan","last_name":"Mossel","first_name":"Elchanan"},{"last_name":"Pach","first_name":"János","full_name":"Pach, János"},{"last_name":"Sharir","first_name":"Micha","full_name":"Sharir, Micha"},{"first_name":"Shakhar","last_name":"Smorodinsky","full_name":"Smorodinsky, Shakhar"},{"full_name":"Uli Wagner","orcid":"0000-0002-1494-0568","id":"36690CA2-F248-11E8-B48F-1D18A9856A87","first_name":"Uli","last_name":"Wagner"},{"full_name":"Welzl, Emo","first_name":"Emo","last_name":"Welzl"}],"status":"public","title":"Online conflict-free coloring for intervals","type":"journal_article","_id":"2430","abstract":[{"text":"We consider an online version of the conflict-free coloring of a set of points on the line, where each newly inserted point must be assigned a color upon insertion, and at all times the coloring has to be conflict-free, in the sense that in every interval I there is a color that appears exactly once in I. We present deterministic and randomized algorithms for achieving this goal, and analyze their performance, that is, the maximum number of colors that they need to use, as a function of the number n of inserted points. We first show that a natural and simple (deterministic) approach may perform rather poorly, requiring Ω(√̃) colors in the worst case. We then derive two efficient variants of this simple algorithm. The first is deterministic and uses O(log 2 n) colors, and the second is randomized and uses O(log n) colors with high probability. We also show that the O(log 2 n) bound on the number of colors used by our deterministic algorithm is tight on the worst case. We also analyze the performance of the simplest proposed algorithm when the points are inserted in a random order and present an incomplete analysis that indicates that, with high probability, it uses only O(log n) colors. Finally, we show that in the extension of this problem to two dimensions, where the relevant ranges are disks, n colors may be required in the worst case.","lang":"eng"}],"intvolume":"        36","extern":1,"publisher":"SIAM","issue":"5","publist_id":"4490","date_created":"2018-12-11T11:57:37Z","day":"01","year":"2006","quality_controlled":0},{"type":"conference","_id":"2431","author":[{"full_name":"Uli Wagner","orcid":"0000-0002-1494-0568","last_name":"Wagner","first_name":"Uli","id":"36690CA2-F248-11E8-B48F-1D18A9856A87"}],"status":"public","title":"On a geometric generalization of the Upper Bound Theorem","date_updated":"2021-01-12T06:57:27Z","page":"635 - 645","doi":"10.1109/FOCS.2006.53","date_published":"2006-06-08T00:00:00Z","publication_status":"published","citation":{"mla":"Wagner, Uli. <i>On a Geometric Generalization of the Upper Bound Theorem</i>. IEEE, 2006, pp. 635–45, doi:<a href=\"https://doi.org/10.1109/FOCS.2006.53\">10.1109/FOCS.2006.53</a>.","ama":"Wagner U. On a geometric generalization of the Upper Bound Theorem. In: IEEE; 2006:635-645. doi:<a href=\"https://doi.org/10.1109/FOCS.2006.53\">10.1109/FOCS.2006.53</a>","short":"U. Wagner, in:, IEEE, 2006, pp. 635–645.","ista":"Wagner U. 2006. On a geometric generalization of the Upper Bound Theorem. FOCS: Foundations of Computer Science, IEEE Conference Proceedings, , 635–645.","ieee":"U. Wagner, “On a geometric generalization of the Upper Bound Theorem,” presented at the FOCS: Foundations of Computer Science, 2006, pp. 635–645.","chicago":"Wagner, Uli. “On a Geometric Generalization of the Upper Bound Theorem,” 635–45. IEEE, 2006. <a href=\"https://doi.org/10.1109/FOCS.2006.53\">https://doi.org/10.1109/FOCS.2006.53</a>.","apa":"Wagner, U. (2006). On a geometric generalization of the Upper Bound Theorem (pp. 635–645). Presented at the FOCS: Foundations of Computer Science, IEEE. <a href=\"https://doi.org/10.1109/FOCS.2006.53\">https://doi.org/10.1109/FOCS.2006.53</a>"},"month":"06","alternative_title":["IEEE Conference Proceedings"],"day":"08","quality_controlled":0,"year":"2006","publist_id":"4489","date_created":"2018-12-11T11:57:37Z","extern":1,"publisher":"IEEE","conference":{"name":"FOCS: Foundations of Computer Science"},"abstract":[{"lang":"eng","text":"We prove an upper bound, tight up to a factor of 2, for the number of vertices of level at most t in an arrangement of n halfspaces in R , for arbitrary n and d (in particular, the dimension d is not considered constant). This partially settles a conjecture of Eckhoff, Linhart, and Welzl. Up to the factor of 2, the result generalizes McMullen's Upper Bound Theorem for convex polytopes (the case ℓ = O) and extends a theorem of Linhart for the case d ≤ 4. Moreover, the bound sharpens asymptotic estimates obtained by Clarkson and Shor. The proof is based on the h-matrix of the arrangement (a generalization, introduced by Mulmuley, of the h-vector of a convex polytope). We show that bounding appropriate sums of entries of this matrix reduces to a lemma about quadrupels of sets with certain intersection properties, and we prove this lemma, up to a factor of 2, using tools from multilinear algebra. This extends an approach of Alon and Kalai, who used linear algebra methods for an alternative proof of the classical Upper Bound Theorem. The bounds for the entries of the h-matrix also imply bounds for the number of i-dimensional faces, i &gt; 0, at level at most ℓ. Furthermore, we discuss a connection with crossing numbers of graphs that was one of the main motivations for investigating exact bounds that are valid for arbitrary dimensions."}]},{"title":"What is learned beyond the scale of single cells?","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","language":[{"iso":"eng"}],"author":[{"last_name":"Büchi","first_name":"Felix N.","full_name":"Büchi, Felix N."},{"first_name":"Stefan Alexander","last_name":"Freunberger","id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425","orcid":"0000-0003-2902-5319","full_name":"Freunberger, Stefan Alexander"},{"first_name":"Marco","last_name":"Santis","full_name":"Santis, Marco"}],"status":"public","type":"conference","_id":"7326","month":"11","citation":{"ama":"Büchi FN, Freunberger SA, Santis M. What is learned beyond the scale of single cells? In: <i>ECS Transactions</i>. Vol 3. ECS; 2006:963-968. doi:<a href=\"https://doi.org/10.1149/1.2356215\">10.1149/1.2356215</a>","mla":"Büchi, Felix N., et al. “What Is Learned beyond the Scale of Single Cells?” <i>ECS Transactions</i>, vol. 3, no. 1, ECS, 2006, pp. 963–68, doi:<a href=\"https://doi.org/10.1149/1.2356215\">10.1149/1.2356215</a>.","apa":"Büchi, F. N., Freunberger, S. A., &#38; Santis, M. (2006). What is learned beyond the scale of single cells? In <i>ECS Transactions</i> (Vol. 3, pp. 963–968). Cancun, Mexico: ECS. <a href=\"https://doi.org/10.1149/1.2356215\">https://doi.org/10.1149/1.2356215</a>","ieee":"F. N. Büchi, S. A. Freunberger, and M. Santis, “What is learned beyond the scale of single cells?,” in <i>ECS Transactions</i>, Cancun, Mexico, 2006, vol. 3, no. 1, pp. 963–968.","chicago":"Büchi, Felix N., Stefan Alexander Freunberger, and Marco Santis. “What Is Learned beyond the Scale of Single Cells?” In <i>ECS Transactions</i>, 3:963–68. ECS, 2006. <a href=\"https://doi.org/10.1149/1.2356215\">https://doi.org/10.1149/1.2356215</a>.","short":"F.N. Büchi, S.A. Freunberger, M. Santis, in:, ECS Transactions, ECS, 2006, pp. 963–968.","ista":"Büchi FN, Freunberger SA, Santis M. 2006. What is learned beyond the scale of single cells? ECS Transactions. ECS Meeting vol. 3, 963–968."},"volume":3,"doi":"10.1149/1.2356215","date_updated":"2021-01-12T08:13:05Z","page":"963-968","publication_status":"published","date_published":"2006-11-03T00:00:00Z","article_processing_charge":"No","publication":"ECS Transactions","issue":"1","date_created":"2020-01-15T12:22:44Z","quality_controlled":"1","year":"2006","oa_version":"None","day":"03","abstract":[{"lang":"eng","text":"Often the properties of a single cell are considered as representative for a complete polymer electrolyte fuel cell stack or even a fuel cell system. In some cases this comes close, however, in many real cases differences on several scales become important. Cell interaction phenomena in fuel cell stacks that arise from inequalities between adjacent cells are investigated in detail experimentally. For that, a specialized 2-cell stack with advanced localized diagnostics was developed. The results show that inequalities propagate by electrical coupling, inhomogeneous cell polarization and inducing in-plane current in the common bipolar plate. The effects of the different loss-mechanisms are analyzed and quantified. "}],"intvolume":"         3","conference":{"end_date":"2006-11-03","name":"ECS Meeting","location":"Cancun, Mexico","start_date":"2006-10-29"},"publisher":"ECS","extern":"1"},{"year":"2006","oa_version":"None","day":"27","article_type":"original","issue":"2","date_created":"2020-01-15T12:22:56Z","publisher":"Elsevier","extern":"1","intvolume":"       161","abstract":[{"text":"Propagation of performance changes to adjacent cells in polymer electrolyte fuel cell stacks is studied by means of voltage monitoring and local current density measurements in peripheral cells of the stack. A technical fuel cell stack has been modified by implementing two independent reactant and coolant supplies in order to deliberately change the performance of one cell (anomalous cell) and study the coupling phenomena to adjacent cells (coupling cells), while keeping the working conditions of the later cell-group unaltered.\r\nTwo anomalies are studied: (i) air starvation and (ii) thermal anomaly, in a single anomalous cell in the stack and their coupling to adjacent cells. The results have shown that anomalies inducing considerable changes in the local current density of the anomalous cell (such as air starvation) propagate to adjacent cells affecting their performance. The propagation of local current density changes takes place via the common bipolar plate due to its finite thickness and in-plane conductivity. Consequently, anomalies which do not strongly influence the local current density distribution (such as a thermal anomaly under the studied working conditions) do not propagate to adjacent cells.","lang":"eng"}],"publication_identifier":{"issn":["0378-7753"]},"type":"journal_article","_id":"7327","title":"Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks","language":[{"iso":"eng"}],"status":"public","author":[{"last_name":"Santis","first_name":"Marco","full_name":"Santis, Marco"},{"id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425","first_name":"Stefan Alexander","last_name":"Freunberger","full_name":"Freunberger, Stefan Alexander","orcid":"0000-0003-2902-5319"},{"full_name":"Papra, Matthias","first_name":"Matthias","last_name":"Papra"},{"last_name":"Wokaun","first_name":"Alexander","full_name":"Wokaun, Alexander"},{"first_name":"Felix N.","last_name":"Büchi","full_name":"Büchi, Felix N."}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","doi":"10.1016/j.jpowsour.2006.06.007","date_updated":"2021-01-12T08:13:06Z","page":"1076-1083","publication_status":"published","date_published":"2006-10-27T00:00:00Z","publication":"Journal of Power Sources","article_processing_charge":"No","month":"10","citation":{"ista":"Santis M, Freunberger SA, Papra M, Wokaun A, Büchi FN. 2006. Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks. Journal of Power Sources. 161(2), 1076–1083.","short":"M. Santis, S.A. Freunberger, M. Papra, A. Wokaun, F.N. Büchi, Journal of Power Sources 161 (2006) 1076–1083.","chicago":"Santis, Marco, Stefan Alexander Freunberger, Matthias Papra, Alexander Wokaun, and Felix N. Büchi. “Experimental Investigation of Coupling Phenomena in Polymer Electrolyte Fuel Cell Stacks.” <i>Journal of Power Sources</i>. Elsevier, 2006. <a href=\"https://doi.org/10.1016/j.jpowsour.2006.06.007\">https://doi.org/10.1016/j.jpowsour.2006.06.007</a>.","ieee":"M. Santis, S. A. Freunberger, M. Papra, A. Wokaun, and F. N. Büchi, “Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks,” <i>Journal of Power Sources</i>, vol. 161, no. 2. Elsevier, pp. 1076–1083, 2006.","apa":"Santis, M., Freunberger, S. A., Papra, M., Wokaun, A., &#38; Büchi, F. N. (2006). Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks. <i>Journal of Power Sources</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.jpowsour.2006.06.007\">https://doi.org/10.1016/j.jpowsour.2006.06.007</a>","mla":"Santis, Marco, et al. “Experimental Investigation of Coupling Phenomena in Polymer Electrolyte Fuel Cell Stacks.” <i>Journal of Power Sources</i>, vol. 161, no. 2, Elsevier, 2006, pp. 1076–83, doi:<a href=\"https://doi.org/10.1016/j.jpowsour.2006.06.007\">10.1016/j.jpowsour.2006.06.007</a>.","ama":"Santis M, Freunberger SA, Papra M, Wokaun A, Büchi FN. Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks. <i>Journal of Power Sources</i>. 2006;161(2):1076-1083. doi:<a href=\"https://doi.org/10.1016/j.jpowsour.2006.06.007\">10.1016/j.jpowsour.2006.06.007</a>"},"volume":161},{"doi":"10.1149/1.2345591","date_updated":"2021-01-12T08:13:06Z","date_published":"2006-09-20T00:00:00Z","publication_status":"published","publication":"Journal of The Electrochemical Society","article_processing_charge":"No","month":"09","citation":{"short":"S.A. Freunberger, M. Reum, J. Evertz, A. Wokaun, F.N. Büchi, Journal of The Electrochemical Society 153 (2006).","ista":"Freunberger SA, Reum M, Evertz J, Wokaun A, Büchi FN. 2006. Measuring the current distribution in PEFCs with sub-millimeter resolution. Journal of The Electrochemical Society. 153(11), A2158.","ieee":"S. A. Freunberger, M. Reum, J. Evertz, A. Wokaun, and F. N. Büchi, “Measuring the current distribution in PEFCs with sub-millimeter resolution,” <i>Journal of The Electrochemical Society</i>, vol. 153, no. 11. The Electrochemical Society, 2006.","chicago":"Freunberger, Stefan Alexander, Mathias Reum, Jörg Evertz, Alexander Wokaun, and Felix N. Büchi. “Measuring the Current Distribution in PEFCs with Sub-Millimeter Resolution.” <i>Journal of The Electrochemical Society</i>. The Electrochemical Society, 2006. <a href=\"https://doi.org/10.1149/1.2345591\">https://doi.org/10.1149/1.2345591</a>.","apa":"Freunberger, S. A., Reum, M., Evertz, J., Wokaun, A., &#38; Büchi, F. N. (2006). Measuring the current distribution in PEFCs with sub-millimeter resolution. <i>Journal of The Electrochemical Society</i>. The Electrochemical Society. <a href=\"https://doi.org/10.1149/1.2345591\">https://doi.org/10.1149/1.2345591</a>","mla":"Freunberger, Stefan Alexander, et al. “Measuring the Current Distribution in PEFCs with Sub-Millimeter Resolution.” <i>Journal of The Electrochemical Society</i>, vol. 153, no. 11, A2158, The Electrochemical Society, 2006, doi:<a href=\"https://doi.org/10.1149/1.2345591\">10.1149/1.2345591</a>.","ama":"Freunberger SA, Reum M, Evertz J, Wokaun A, Büchi FN. Measuring the current distribution in PEFCs with sub-millimeter resolution. <i>Journal of The Electrochemical Society</i>. 2006;153(11). doi:<a href=\"https://doi.org/10.1149/1.2345591\">10.1149/1.2345591</a>"},"volume":153,"type":"journal_article","_id":"7328","title":"Measuring the current distribution in PEFCs with sub-millimeter resolution","author":[{"full_name":"Freunberger, Stefan Alexander","orcid":"0000-0003-2902-5319","id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425","first_name":"Stefan Alexander","last_name":"Freunberger"},{"full_name":"Reum, Mathias","first_name":"Mathias","last_name":"Reum"},{"last_name":"Evertz","first_name":"Jörg","full_name":"Evertz, Jörg"},{"last_name":"Wokaun","first_name":"Alexander","full_name":"Wokaun, Alexander"},{"last_name":"Büchi","first_name":"Felix N.","full_name":"Büchi, Felix N."}],"status":"public","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","language":[{"iso":"eng"}],"publisher":"The Electrochemical Society","extern":"1","intvolume":"       153","abstract":[{"lang":"eng","text":"An experimental technique for measuring the current density distribution with a resolution smaller than the channel/rib scale of the flow field in polymer electrolyte fuel cells (PEFCs) is presented. The electron conductors in a plane perpendicular to the channel direction are considered as two-dimensional resistors. Hence, the current density is obtained from the solution of Laplace's equation with the potentials at current collector and reaction layer as boundary conditions. Using ohmic drop for calculating the local current, detailed knowledge of all resistances involved is of prime importance. In particular, the contact resistance between the gas diffusion layer (GDL) and flow field rib, as well as GDL bulk conductivity, are strongly dependent on clamping pressure. They represent a substantial amount of the total ohmic drop and therefore require careful consideration. The detailed experimental setup as well as the concise procedure for quantitative data evaluation is described. Finally, the method is applied successfully to a cell operated on pure oxygen and air up to high current densities. The results show that electrical and ionic resistances seem to govern the current distribution at low current regimes, whereas mass transport limitations locally hamper the current production at high loads."}],"publication_identifier":{"issn":["0013-4651"]},"year":"2006","oa_version":"None","quality_controlled":"1","day":"20","article_type":"original","issue":"11","article_number":"A2158","date_created":"2020-01-15T12:23:12Z"},{"publisher":"Elsevier","extern":"1","abstract":[{"text":"A novel measurement principle for measuring the current distribution in polymer electrolyte fuel cells (PEFCs) is introduced. It allows, in contrast to all other known techniques, for the first time for a resolution smaller than the channel/rib scale of the flow field in PEFCs. The current density is obtained by considering the electron conductors in the cell as a two-dimensional resistor with the voltage drop caused by the current. The method was applied to a cell operated on oxygen up to high current densities. The results show that the ohmic resistances govern the current distribution in the low current regime, whereas mass transport limitations hamper the current production under the land at high loads.","lang":"eng"}],"intvolume":"         8","publication_identifier":{"issn":["1388-2481"]},"quality_controlled":"1","year":"2006","oa_version":"None","day":"01","article_type":"original","issue":"9","date_created":"2020-01-15T12:23:22Z","doi":"10.1016/j.elecom.2006.05.032","page":"1435-1438","date_updated":"2021-01-12T08:13:06Z","date_published":"2006-09-01T00:00:00Z","publication_status":"published","publication":"Electrochemistry Communications","article_processing_charge":"No","month":"09","citation":{"short":"S.A. Freunberger, M. Reum, A. Wokaun, F.N. Büchi, Electrochemistry Communications 8 (2006) 1435–1438.","ista":"Freunberger SA, Reum M, Wokaun A, Büchi FN. 2006. Expanding current distribution measurement in PEFCs to sub-millimeter resolution. Electrochemistry Communications. 8(9), 1435–1438.","chicago":"Freunberger, Stefan Alexander, Mathias Reum, Alexander Wokaun, and Felix N. Büchi. “Expanding Current Distribution Measurement in PEFCs to Sub-Millimeter Resolution.” <i>Electrochemistry Communications</i>. Elsevier, 2006. <a href=\"https://doi.org/10.1016/j.elecom.2006.05.032\">https://doi.org/10.1016/j.elecom.2006.05.032</a>.","ieee":"S. A. Freunberger, M. Reum, A. Wokaun, and F. N. Büchi, “Expanding current distribution measurement in PEFCs to sub-millimeter resolution,” <i>Electrochemistry Communications</i>, vol. 8, no. 9. Elsevier, pp. 1435–1438, 2006.","apa":"Freunberger, S. A., Reum, M., Wokaun, A., &#38; Büchi, F. N. (2006). Expanding current distribution measurement in PEFCs to sub-millimeter resolution. <i>Electrochemistry Communications</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.elecom.2006.05.032\">https://doi.org/10.1016/j.elecom.2006.05.032</a>","mla":"Freunberger, Stefan Alexander, et al. “Expanding Current Distribution Measurement in PEFCs to Sub-Millimeter Resolution.” <i>Electrochemistry Communications</i>, vol. 8, no. 9, Elsevier, 2006, pp. 1435–38, doi:<a href=\"https://doi.org/10.1016/j.elecom.2006.05.032\">10.1016/j.elecom.2006.05.032</a>.","ama":"Freunberger SA, Reum M, Wokaun A, Büchi FN. Expanding current distribution measurement in PEFCs to sub-millimeter resolution. <i>Electrochemistry Communications</i>. 2006;8(9):1435-1438. doi:<a href=\"https://doi.org/10.1016/j.elecom.2006.05.032\">10.1016/j.elecom.2006.05.032</a>"},"volume":8,"type":"journal_article","_id":"7329","title":"Expanding current distribution measurement in PEFCs to sub-millimeter resolution","author":[{"full_name":"Freunberger, Stefan Alexander","orcid":"0000-0003-2902-5319","id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425","last_name":"Freunberger","first_name":"Stefan Alexander"},{"full_name":"Reum, Mathias","first_name":"Mathias","last_name":"Reum"},{"last_name":"Wokaun","first_name":"Alexander","full_name":"Wokaun, Alexander"},{"last_name":"Büchi","first_name":"Felix N.","full_name":"Büchi, Felix N."}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","status":"public","language":[{"iso":"eng"}]},{"type":"journal_article","_id":"7330","title":"Homogenization of the current density in polymer electrolyte fuel cells by in-plane cathode catalyst gradients","language":[{"iso":"eng"}],"status":"public","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"full_name":"Santis, M.","first_name":"M.","last_name":"Santis"},{"full_name":"Freunberger, Stefan Alexander","orcid":"0000-0003-2902-5319","id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425","first_name":"Stefan Alexander","last_name":"Freunberger"},{"full_name":"Reiner, A.","last_name":"Reiner","first_name":"A."},{"last_name":"Büchi","first_name":"F.N.","full_name":"Büchi, F.N."}],"doi":"10.1016/j.electacta.2006.02.008","page":"5383-5393","date_updated":"2021-01-12T08:13:07Z","date_published":"2006-07-01T00:00:00Z","publication_status":"published","article_processing_charge":"No","publication":"Electrochimica Acta","month":"07","citation":{"ama":"Santis M, Freunberger SA, Reiner A, Büchi FN. Homogenization of the current density in polymer electrolyte fuel cells by in-plane cathode catalyst gradients. <i>Electrochimica Acta</i>. 2006;51(25):5383-5393. doi:<a href=\"https://doi.org/10.1016/j.electacta.2006.02.008\">10.1016/j.electacta.2006.02.008</a>","mla":"Santis, M., et al. “Homogenization of the Current Density in Polymer Electrolyte Fuel Cells by In-Plane Cathode Catalyst Gradients.” <i>Electrochimica Acta</i>, vol. 51, no. 25, Elsevier, 2006, pp. 5383–93, doi:<a href=\"https://doi.org/10.1016/j.electacta.2006.02.008\">10.1016/j.electacta.2006.02.008</a>.","apa":"Santis, M., Freunberger, S. A., Reiner, A., &#38; Büchi, F. N. (2006). Homogenization of the current density in polymer electrolyte fuel cells by in-plane cathode catalyst gradients. <i>Electrochimica Acta</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.electacta.2006.02.008\">https://doi.org/10.1016/j.electacta.2006.02.008</a>","chicago":"Santis, M., Stefan Alexander Freunberger, A. Reiner, and F.N. Büchi. “Homogenization of the Current Density in Polymer Electrolyte Fuel Cells by In-Plane Cathode Catalyst Gradients.” <i>Electrochimica Acta</i>. Elsevier, 2006. <a href=\"https://doi.org/10.1016/j.electacta.2006.02.008\">https://doi.org/10.1016/j.electacta.2006.02.008</a>.","ieee":"M. Santis, S. A. Freunberger, A. Reiner, and F. N. Büchi, “Homogenization of the current density in polymer electrolyte fuel cells by in-plane cathode catalyst gradients,” <i>Electrochimica Acta</i>, vol. 51, no. 25. Elsevier, pp. 5383–5393, 2006.","short":"M. Santis, S.A. Freunberger, A. Reiner, F.N. Büchi, Electrochimica Acta 51 (2006) 5383–5393.","ista":"Santis M, Freunberger SA, Reiner A, Büchi FN. 2006. Homogenization of the current density in polymer electrolyte fuel cells by in-plane cathode catalyst gradients. Electrochimica Acta. 51(25), 5383–5393."},"volume":51,"oa_version":"None","quality_controlled":"1","year":"2006","day":"01","article_type":"original","issue":"25","date_created":"2020-01-15T12:23:34Z","publisher":"Elsevier","extern":"1","intvolume":"        51","abstract":[{"text":"Polymer electrolyte fuel cells (PE fuel cells) working with air at low stoichiometries (<2.0) and standard electrochemical components show a high degree of inhomogeneity in the current density distribution over the active area. An inhomogeneous current density distribution leads to a non-uniform utilization of the active area, which could negatively affect the time of life of the cells. Furthermore, it is also believed to lower cell performance. In this work, the homogenization of the current density, realized by means of tailored cathodes with along-the-air-channel redistributed catalyst loadings, is investigated. The air stoichiometry range for which a homogenization of the current density is achieved depends upon the gradient with which the catalyst is redistributed along the air channel. A gentle increasing catalyst loading profile homogenizes the current density at relatively higher air stoichiometries, while a steeper profile is suited better for lower air stoichiometries. The results show that a homogenization of the current density by means of redistributed catalyst loading has negative effects on cell performance. Model calculations corroborate the experimental findings on homogenization of the current density and deliver an explanation for the decrease in cell performance.","lang":"eng"}],"publication_identifier":{"issn":["0013-4686"]}},{"day":"27","quality_controlled":"1","year":"2006","oa_version":"None","article_type":"original","issue":"5","article_number":"A909","date_created":"2020-01-15T12:23:46Z","extern":"1","publisher":"The Electrochemical Society","intvolume":"       153","abstract":[{"lang":"eng","text":"A previously developed mathematical model for water management and current density distribution in a polymer electrolyte fuel cell (PEFCs) is employed to investigate the effects of cooling strategies on cell performance. The model describes a two-dimensional slice through the cell along the channels and through the entire cell sandwich including the coolant channels and the bipolar plate. Arbitrary flow arrangements of fuel, oxidant, and coolant stream directions can be described. Due to the serious impact of temperature on all processes in the PEFC, both the relative direction of the coolant stream to the gas streams and its mass flow turns out to significantly affect the cell performance. Besides influencing the electrochemical reaction and all kinds of mass transfer temperature, variations predominantly alter the local membrane hydration distribution and subseqently its conductivity."}],"publication_identifier":{"issn":["0013-4651"]},"type":"journal_article","_id":"7331","language":[{"iso":"eng"}],"author":[{"full_name":"Freunberger, Stefan Alexander","orcid":"0000-0003-2902-5319","last_name":"Freunberger","first_name":"Stefan Alexander","id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425"},{"full_name":"Wokaun, Alexander","first_name":"Alexander","last_name":"Wokaun"},{"full_name":"Büchi, Felix N.","first_name":"Felix N.","last_name":"Büchi"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","status":"public","title":"In-plane effects in large-scale PEFCs: II. The influence of cooling strategy on cell performance","date_updated":"2021-01-12T08:13:08Z","doi":"10.1149/1.2185282","publication":"Journal of The Electrochemical Society","article_processing_charge":"No","date_published":"2006-03-27T00:00:00Z","publication_status":"published","citation":{"mla":"Freunberger, Stefan Alexander, et al. “In-Plane Effects in Large-Scale PEFCs: II. The Influence of Cooling Strategy on Cell Performance.” <i>Journal of The Electrochemical Society</i>, vol. 153, no. 5, A909, The Electrochemical Society, 2006, doi:<a href=\"https://doi.org/10.1149/1.2185282\">10.1149/1.2185282</a>.","ama":"Freunberger SA, Wokaun A, Büchi FN. In-plane effects in large-scale PEFCs: II. The influence of cooling strategy on cell performance. <i>Journal of The Electrochemical Society</i>. 2006;153(5). doi:<a href=\"https://doi.org/10.1149/1.2185282\">10.1149/1.2185282</a>","short":"S.A. Freunberger, A. Wokaun, F.N. Büchi, Journal of The Electrochemical Society 153 (2006).","ista":"Freunberger SA, Wokaun A, Büchi FN. 2006. In-plane effects in large-scale PEFCs: II. The influence of cooling strategy on cell performance. Journal of The Electrochemical Society. 153(5), A909.","ieee":"S. A. Freunberger, A. Wokaun, and F. N. Büchi, “In-plane effects in large-scale PEFCs: II. The influence of cooling strategy on cell performance,” <i>Journal of The Electrochemical Society</i>, vol. 153, no. 5. The Electrochemical Society, 2006.","chicago":"Freunberger, Stefan Alexander, Alexander Wokaun, and Felix N. Büchi. “In-Plane Effects in Large-Scale PEFCs: II. The Influence of Cooling Strategy on Cell Performance.” <i>Journal of The Electrochemical Society</i>. The Electrochemical Society, 2006. <a href=\"https://doi.org/10.1149/1.2185282\">https://doi.org/10.1149/1.2185282</a>.","apa":"Freunberger, S. A., Wokaun, A., &#38; Büchi, F. N. (2006). In-plane effects in large-scale PEFCs: II. The influence of cooling strategy on cell performance. <i>Journal of The Electrochemical Society</i>. The Electrochemical Society. <a href=\"https://doi.org/10.1149/1.2185282\">https://doi.org/10.1149/1.2185282</a>"},"month":"03","volume":153},{"issue":"2","date_created":"2020-01-15T12:24:00Z","article_number":"A396","day":"04","oa_version":"None","quality_controlled":"1","year":"2006","article_type":"original","intvolume":"       153","abstract":[{"lang":"eng","text":"A quasi-two-dimensional, along-the-channel mass and heat-transfer model for a proton exchange membrane fuel cell (PEFC) is described and validated against experimental current distribution data. The model is formulated in a dimensional manner, i.e., local transport phenomena are treated one-dimensional in through-plane direction and coupled in-plane by convective transport in the gas and coolant channels. Thus, a two-dimensional slice running through the repetitive unit of a cell from the anode channel via membrane-electrode assembly (MEA) and cathode channel to the coolant channel and from inlet to outlet is modeled. The aim of the work is to elucidate the influence of operating conditions such as feed gas humidities and stoichiometric ratios on the along-the-channel current density distribution and to identify the distinct underlying voltage loss mechanisms. Furthermore, a complicated technical flow field is modeled by a combination of co- and counterflow subdomains and compared with experimental current densities."}],"publication_identifier":{"issn":["0013-4651"]},"extern":"1","publisher":"The Electrochemical Society","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","language":[{"iso":"eng"}],"status":"public","author":[{"orcid":"0000-0003-2902-5319","full_name":"Freunberger, Stefan Alexander","id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425","first_name":"Stefan Alexander","last_name":"Freunberger"},{"full_name":"Santis, Marco","last_name":"Santis","first_name":"Marco"},{"full_name":"Schneider, Ingo A.","first_name":"Ingo A.","last_name":"Schneider"},{"first_name":"Alexander","last_name":"Wokaun","full_name":"Wokaun, Alexander"},{"first_name":"Felix N.","last_name":"Büchi","full_name":"Büchi, Felix N."}],"title":"In-plane effects in large-scale PEMFCs","type":"journal_article","_id":"7332","citation":{"mla":"Freunberger, Stefan Alexander, et al. “In-Plane Effects in Large-Scale PEMFCs.” <i>Journal of The Electrochemical Society</i>, vol. 153, no. 2, A396, The Electrochemical Society, 2006, doi:<a href=\"https://doi.org/10.1149/1.2150150\">10.1149/1.2150150</a>.","ama":"Freunberger SA, Santis M, Schneider IA, Wokaun A, Büchi FN. In-plane effects in large-scale PEMFCs. <i>Journal of The Electrochemical Society</i>. 2006;153(2). doi:<a href=\"https://doi.org/10.1149/1.2150150\">10.1149/1.2150150</a>","short":"S.A. Freunberger, M. Santis, I.A. Schneider, A. Wokaun, F.N. Büchi, Journal of The Electrochemical Society 153 (2006).","ista":"Freunberger SA, Santis M, Schneider IA, Wokaun A, Büchi FN. 2006. In-plane effects in large-scale PEMFCs. Journal of The Electrochemical Society. 153(2), A396.","apa":"Freunberger, S. A., Santis, M., Schneider, I. A., Wokaun, A., &#38; Büchi, F. N. (2006). In-plane effects in large-scale PEMFCs. <i>Journal of The Electrochemical Society</i>. The Electrochemical Society. <a href=\"https://doi.org/10.1149/1.2150150\">https://doi.org/10.1149/1.2150150</a>","chicago":"Freunberger, Stefan Alexander, Marco Santis, Ingo A. Schneider, Alexander Wokaun, and Felix N. Büchi. “In-Plane Effects in Large-Scale PEMFCs.” <i>Journal of The Electrochemical Society</i>. The Electrochemical Society, 2006. <a href=\"https://doi.org/10.1149/1.2150150\">https://doi.org/10.1149/1.2150150</a>.","ieee":"S. A. Freunberger, M. Santis, I. A. Schneider, A. Wokaun, and F. N. Büchi, “In-plane effects in large-scale PEMFCs,” <i>Journal of The Electrochemical Society</i>, vol. 153, no. 2. The Electrochemical Society, 2006."},"month":"01","volume":153,"date_updated":"2021-01-12T08:13:08Z","doi":"10.1149/1.2150150","publication":"Journal of The Electrochemical Society","article_processing_charge":"No","date_published":"2006-01-04T00:00:00Z","publication_status":"published"},{"alternative_title":["LNCS"],"volume":4144,"citation":{"short":"D. Beyer, T.A. Henzinger, G. Théoduloz, in:, Springer, 2006, pp. 532–546.","ista":"Beyer D, Henzinger TA, Théoduloz G. 2006. Lazy shape analysis. CAV: Computer Aided Verification, LNCS, vol. 4144, 532–546.","apa":"Beyer, D., Henzinger, T. A., &#38; Théoduloz, G. (2006). Lazy shape analysis (Vol. 4144, pp. 532–546). Presented at the CAV: Computer Aided Verification, Springer. <a href=\"https://doi.org/10.1007/11817963_48\">https://doi.org/10.1007/11817963_48</a>","chicago":"Beyer, Dirk, Thomas A Henzinger, and Grégory Théoduloz. “Lazy Shape Analysis,” 4144:532–46. Springer, 2006. <a href=\"https://doi.org/10.1007/11817963_48\">https://doi.org/10.1007/11817963_48</a>.","ieee":"D. Beyer, T. A. Henzinger, and G. Théoduloz, “Lazy shape analysis,” presented at the CAV: Computer Aided Verification, 2006, vol. 4144, pp. 532–546.","mla":"Beyer, Dirk, et al. <i>Lazy Shape Analysis</i>. Vol. 4144, Springer, 2006, pp. 532–46, doi:<a href=\"https://doi.org/10.1007/11817963_48\">10.1007/11817963_48</a>.","ama":"Beyer D, Henzinger TA, Théoduloz G. Lazy shape analysis. In: Vol 4144. Springer; 2006:532-546. doi:<a href=\"https://doi.org/10.1007/11817963_48\">10.1007/11817963_48</a>"},"month":"08","date_published":"2006-08-08T00:00:00Z","publication_status":"published","date_updated":"2021-01-12T07:59:49Z","page":"532 - 546","doi":"10.1007/11817963_48","author":[{"last_name":"Beyer","first_name":"Dirk","full_name":"Beyer, Dirk"},{"last_name":"Henzinger","first_name":"Thomas A","id":"40876CD8-F248-11E8-B48F-1D18A9856A87","orcid":"0000−0002−2985−7724","full_name":"Thomas Henzinger"},{"full_name":"Théoduloz, Grégory","last_name":"Théoduloz","first_name":"Grégory"}],"status":"public","title":"Lazy shape analysis","_id":"4574","type":"conference","conference":{"name":"CAV: Computer Aided Verification"},"intvolume":"      4144","abstract":[{"text":"Many software model checkers are based on predicate abstraction. If the verification goal depends on pointer structures, the approach does not work well, because it is difficult to find adequate predicate abstractions for the heap. In contrast, shape analysis, which uses graph-based heap abstractions, can provide a compact representation of recursive data structures. We integrate shape analysis into the software model checker Blast. Because shape analysis is expensive, we do not apply it globally. Instead, we ensure that, like predicates, shape graphs are computed and stored locally, only where necessary for proving the verification goal. To achieve this, we extend lazy abstraction refinement, which so far has been used only for predicate abstractions, to three-valued logical structures. This approach does not only increase the precision of model checking, but it also increases the efficiency of shape analysis. We implemented the technique by extending Blast with calls to Tvla.","lang":"eng"}],"extern":1,"publisher":"Springer","date_created":"2018-12-11T12:09:33Z","publist_id":"133","day":"08","quality_controlled":0,"year":"2006"},{"abstract":[{"lang":"eng","text":"Mitchison and Jozsa recently suggested that the &quot;chained-Zeno&quot; counterfactual computation protocol recently proposed by Hosten et al. is counterfactual for only one output of the computer. This claim was based on the existing abstract algebraic definition of counterfactual computation, and indeed according to this definition, their argument is correct. However, a more general definition (physically adequate) for counterfactual computation is implicitly assumed by Hosten et. al. Here we explain in detail why the protocol is counterfactual and how the &quot;history tracking&quot; method of the existing description inadequately represents the physics underlying the protocol. Consequently, we propose a modified definition of counterfactual computation. Finally, we comment on one of the most interesting aspects of the error-correcting protocol. "}],"publisher":"ArXiv","extern":"1","date_created":"2018-12-11T11:47:16Z","publist_id":"7241","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/quant-ph/0607101"}],"oa":1,"year":"2006","oa_version":"Preprint","day":"06","external_id":{"arxiv":["0607101"]},"month":"08","citation":{"ama":"Hosten O, Rakher M, Barreiro J, Peters N, Kwiat P. Counterfactual computation revisited. 2006.","mla":"Hosten, Onur, et al. <i>Counterfactual Computation Revisited</i>. ArXiv, 2006.","apa":"Hosten, O., Rakher, M., Barreiro, J., Peters, N., &#38; Kwiat, P. (2006). Counterfactual computation revisited. ArXiv.","chicago":"Hosten, Onur, Matthew Rakher, Julio Barreiro, Nicholas Peters, and Paul Kwiat. “Counterfactual Computation Revisited.” ArXiv, 2006.","ieee":"O. Hosten, M. Rakher, J. Barreiro, N. Peters, and P. Kwiat, “Counterfactual computation revisited.” ArXiv, 2006.","short":"O. Hosten, M. Rakher, J. Barreiro, N. Peters, P. Kwiat, (2006).","ista":"Hosten O, Rakher M, Barreiro J, Peters N, Kwiat P. 2006. Counterfactual computation revisited."},"publication_status":"published","date_published":"2006-08-06T00:00:00Z","article_processing_charge":"No","page":"12","date_updated":"2020-05-12T08:23:52Z","arxiv":1,"title":"Counterfactual computation revisited","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"full_name":"Hosten, Onur","orcid":"0000-0002-2031-204X","id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","last_name":"Hosten","first_name":"Onur"},{"last_name":"Rakher","first_name":"Matthew","full_name":"Rakher, Matthew"},{"full_name":"Barreiro, Julio","first_name":"Julio","last_name":"Barreiro"},{"last_name":"Peters","first_name":"Nicholas","full_name":"Peters, Nicholas"},{"first_name":"Paul","last_name":"Kwiat","full_name":"Kwiat, Paul"}],"language":[{"iso":"eng"}],"status":"public","_id":"573","type":"preprint"},{"day":"19","oa_version":"Preprint","year":"2006","oa":1,"main_file_link":[{"url":"https://arxiv.org/abs/quant-ph/0612159","open_access":"1"}],"publist_id":"7240","date_created":"2018-12-11T11:47:16Z","extern":"1","publisher":"ArXiv","abstract":[{"lang":"eng","text":"Vaidman, in a recent article adopts the method of 'quantum weak measurements in pre- and postselected ensembles' to ascertain whether or not the chained-Zeno counterfactual computation scheme proposed by Hosten et al. is counterfactual; which has been the topic of a debate on the definition of counterfactuality. We disagree with his conclusion, which brings up some interesting aspects of quantum weak measurements and some concerns about the way they are interpreted. "}],"type":"preprint","_id":"574","status":"public","author":[{"last_name":"Hosten","first_name":"Onur","id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2031-204X","full_name":"Hosten, Onur"},{"first_name":"Paul","last_name":"Kwiat","full_name":"Kwiat, Paul"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","language":[{"iso":"eng"}],"title":"Weak measurements and counterfactual computation","date_updated":"2020-05-12T08:18:01Z","page":"2","arxiv":1,"article_processing_charge":"No","date_published":"2006-12-19T00:00:00Z","publication_status":"published","citation":{"ama":"Hosten O, Kwiat P. Weak measurements and counterfactual computation. 2006.","mla":"Hosten, Onur, and Paul Kwiat. <i>Weak Measurements and Counterfactual Computation</i>. ArXiv, 2006.","apa":"Hosten, O., &#38; Kwiat, P. (2006). Weak measurements and counterfactual computation. ArXiv.","chicago":"Hosten, Onur, and Paul Kwiat. “Weak Measurements and Counterfactual Computation.” ArXiv, 2006.","ieee":"O. Hosten and P. Kwiat, “Weak measurements and counterfactual computation.” ArXiv, 2006.","short":"O. Hosten, P. Kwiat, (2006).","ista":"Hosten O, Kwiat P. 2006. Weak measurements and counterfactual computation."},"month":"12","external_id":{"arxiv":["0612159"]}},{"_id":"577","type":"conference","title":"High-efficiency single-photon detectors","status":"public","author":[{"full_name":"Rangarajan, Radhika","last_name":"Rangarajan","first_name":"Radhika"},{"last_name":"Altepeter","first_name":"Joseph","full_name":"Altepeter, Joseph B"},{"first_name":"Evan","last_name":"Jeffrey","full_name":"Jeffrey, Evan R"},{"full_name":"Stoutimore, Micah J","last_name":"Stoutimore","first_name":"Micah"},{"full_name":"Peters, Nicholas A","last_name":"Peters","first_name":"Nicholas"},{"id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","first_name":"Onur","last_name":"Hosten","orcid":"0000-0002-2031-204X","full_name":"Onur Hosten"},{"first_name":"Paul","last_name":"Kwiat","full_name":"Kwiat, Paul G"}],"publication_status":"published","date_published":"2006-01-01T00:00:00Z","doi":"10.1117/12.686117","date_updated":"2020-07-14T12:47:11Z","volume":6372,"alternative_title":["Proceedings of SPIE"],"month":"01","citation":{"mla":"Rangarajan, Radhika, et al. <i>High-Efficiency Single-Photon Detectors</i>. Vol. 6372, SPIE, 2006, doi:<a href=\"https://doi.org/10.1117/12.686117\">10.1117/12.686117</a>.","ama":"Rangarajan R, Altepeter J, Jeffrey E, et al. High-efficiency single-photon detectors. In: Vol 6372. SPIE; 2006. doi:<a href=\"https://doi.org/10.1117/12.686117\">10.1117/12.686117</a>","short":"R. Rangarajan, J. Altepeter, E. Jeffrey, M. Stoutimore, N. Peters, O. Hosten, P. Kwiat, in:, SPIE, 2006.","ista":"Rangarajan R, Altepeter J, Jeffrey E, Stoutimore M, Peters N, Hosten O, Kwiat P. 2006. High-efficiency single-photon detectors. Unknown (978-081946470-5), Proceedings of SPIE, vol. 6372.","apa":"Rangarajan, R., Altepeter, J., Jeffrey, E., Stoutimore, M., Peters, N., Hosten, O., &#38; Kwiat, P. (2006). High-efficiency single-photon detectors (Vol. 6372). Presented at the Unknown (978-081946470-5), SPIE. <a href=\"https://doi.org/10.1117/12.686117\">https://doi.org/10.1117/12.686117</a>","ieee":"R. Rangarajan <i>et al.</i>, “High-efficiency single-photon detectors,” presented at the Unknown (978-081946470-5), 2006, vol. 6372.","chicago":"Rangarajan, Radhika, Joseph Altepeter, Evan Jeffrey, Micah Stoutimore, Nicholas Peters, Onur Hosten, and Paul Kwiat. “High-Efficiency Single-Photon Detectors,” Vol. 6372. SPIE, 2006. <a href=\"https://doi.org/10.1117/12.686117\">https://doi.org/10.1117/12.686117</a>."},"quality_controlled":0,"year":"2006","day":"01","date_created":"2018-12-11T11:47:17Z","publist_id":"7233","publisher":"SPIE","extern":1,"abstract":[{"text":"Visible light photon counters (VLPCs) and solid-state photomultipliers (SSPMs) are high-efficiency single-photon detectors which have multi-photon counting capability. While both the VLPCs and the SSPMs have inferred internal quantum efficiencies above 93%, the actual measured values for both the detectors were in fact limited to less than 88%, attributed to in-coupling losses. We are currently improving this overall detection efficiency via a) custom anti-reflection coating the detectors and the in-coupling fibers, b) implementing a novel cryogenic design to reduce transmission losses and, c) using low-noise electronics to obtain a better signal-to-noise ratio.","lang":"eng"}],"intvolume":"      6372","conference":{"name":"Unknown (978-081946470-5)"}},{"publist_id":"7234","date_created":"2018-12-11T11:47:17Z","year":"2006","quality_controlled":0,"day":"01","abstract":[{"text":"A source of single photons allows secure quantum key distribution, in addition, to being a critical resource for linear optics quantum computing. We describe our progress on deterministically creating single photons from spontaneous parametric downconversion, an extension of the Pittman, Jacobs and Franson scheme [Phys. Rev A, v66, 042303 (2002)]. Their idea was to conditionally prepare single photons by measuring one member of a spontaneously emitted photon pair and storing the remaining conditionally prepared photon until a predetermined time, when it would be &quot;deterministically&quot; released from storage. Our approach attempts to improve upon this by recycling the pump pulse in order to decrease the possibility of multiple-pair generation, while maintaining a high probability of producing a single pair. Many of the challenges we discuss are central to other quantum information technologies, including the need for low-loss optical storage, switching and detection, and fast feed-forward control.","lang":"eng"}],"intvolume":"      6305","conference":{"name":"Quantum Communications and Quantum Imaging"},"publisher":"SPIE","extern":1,"title":"Towards a quasi-deterministic single-photon source","author":[{"last_name":"Peters","first_name":"Nicholas","full_name":"Peters, Nicholas A"},{"full_name":"Arnold, Keith J","last_name":"Arnold","first_name":"Keith"},{"full_name":"VanDevender, Aaron P","last_name":"Vandevender","first_name":"Aaron"},{"first_name":"Evan","last_name":"Jeffrey","full_name":"Jeffrey, Evan R"},{"last_name":"Rangarajan","first_name":"Radhika","full_name":"Rangarajan, Radhika"},{"id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","first_name":"Onur","last_name":"Hosten","orcid":"0000-0002-2031-204X","full_name":"Onur Hosten"},{"full_name":"Barreiro, Julio T","first_name":"Julio","last_name":"Barreiro"},{"full_name":"Altepeter, Joseph B","first_name":"Joseph","last_name":"Altepeter"},{"first_name":"Paul","last_name":"Kwiat","full_name":"Kwiat, Paul G"}],"status":"public","type":"conference","_id":"578","month":"01","citation":{"mla":"Peters, Nicholas, et al. <i>Towards a Quasi-Deterministic Single-Photon Source</i>. Vol. 6305, SPIE, 2006, doi:<a href=\"https://doi.org/10.1117/12.684702\">10.1117/12.684702</a>.","ama":"Peters N, Arnold K, Vandevender A, et al. Towards a quasi-deterministic single-photon source. In: Vol 6305. SPIE; 2006. doi:<a href=\"https://doi.org/10.1117/12.684702\">10.1117/12.684702</a>","ista":"Peters N, Arnold K, Vandevender A, Jeffrey E, Rangarajan R, Hosten O, Barreiro J, Altepeter J, Kwiat P. 2006. Towards a quasi-deterministic single-photon source. Quantum Communications and Quantum Imaging, Proc. SPIE, vol. 6305.","short":"N. Peters, K. Arnold, A. Vandevender, E. Jeffrey, R. Rangarajan, O. Hosten, J. Barreiro, J. Altepeter, P. Kwiat, in:, SPIE, 2006.","apa":"Peters, N., Arnold, K., Vandevender, A., Jeffrey, E., Rangarajan, R., Hosten, O., … Kwiat, P. (2006). Towards a quasi-deterministic single-photon source (Vol. 6305). Presented at the Quantum Communications and Quantum Imaging, SPIE. <a href=\"https://doi.org/10.1117/12.684702\">https://doi.org/10.1117/12.684702</a>","chicago":"Peters, Nicholas, Keith Arnold, Aaron Vandevender, Evan Jeffrey, Radhika Rangarajan, Onur Hosten, Julio Barreiro, Joseph Altepeter, and Paul Kwiat. “Towards a Quasi-Deterministic Single-Photon Source,” Vol. 6305. SPIE, 2006. <a href=\"https://doi.org/10.1117/12.684702\">https://doi.org/10.1117/12.684702</a>.","ieee":"N. Peters <i>et al.</i>, “Towards a quasi-deterministic single-photon source,” presented at the Quantum Communications and Quantum Imaging, 2006, vol. 6305."},"alternative_title":["Proc. SPIE"],"volume":6305,"doi":"10.1117/12.684702","date_updated":"2020-07-14T12:47:11Z","publication_status":"published","date_published":"2006-01-01T00:00:00Z"},{"publication":"Nature","date_published":"2006-02-23T00:00:00Z","publication_status":"published","page":"949 - 952","date_updated":"2021-01-12T08:03:29Z","doi":"10.1038/nature04523","volume":439,"citation":{"chicago":"Hosten, Onur, Matthew Rakher, Julio Barreiro, Nicholas Peters, and Paul Kwiat. “Counterfactual Quantum Computation through Quantum Interrogation.” <i>Nature</i>. Nature Publishing Group, 2006. <a href=\"https://doi.org/10.1038/nature04523\">https://doi.org/10.1038/nature04523</a>.","ieee":"O. Hosten, M. Rakher, J. Barreiro, N. Peters, and P. Kwiat, “Counterfactual quantum computation through quantum interrogation,” <i>Nature</i>, vol. 439, no. 7079. Nature Publishing Group, pp. 949–952, 2006.","apa":"Hosten, O., Rakher, M., Barreiro, J., Peters, N., &#38; Kwiat, P. (2006). Counterfactual quantum computation through quantum interrogation. <i>Nature</i>. Nature Publishing Group. <a href=\"https://doi.org/10.1038/nature04523\">https://doi.org/10.1038/nature04523</a>","ista":"Hosten O, Rakher M, Barreiro J, Peters N, Kwiat P. 2006. Counterfactual quantum computation through quantum interrogation. Nature. 439(7079), 949–952.","short":"O. Hosten, M. Rakher, J. Barreiro, N. Peters, P. Kwiat, Nature 439 (2006) 949–952.","ama":"Hosten O, Rakher M, Barreiro J, Peters N, Kwiat P. Counterfactual quantum computation through quantum interrogation. <i>Nature</i>. 2006;439(7079):949-952. doi:<a href=\"https://doi.org/10.1038/nature04523\">10.1038/nature04523</a>","mla":"Hosten, Onur, et al. “Counterfactual Quantum Computation through Quantum Interrogation.” <i>Nature</i>, vol. 439, no. 7079, Nature Publishing Group, 2006, pp. 949–52, doi:<a href=\"https://doi.org/10.1038/nature04523\">10.1038/nature04523</a>."},"month":"02","_id":"579","type":"journal_article","status":"public","author":[{"id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","last_name":"Hosten","first_name":"Onur","orcid":"0000-0002-2031-204X","full_name":"Onur Hosten"},{"first_name":"Matthew","last_name":"Rakher","full_name":"Rakher, Matthew T"},{"last_name":"Barreiro","first_name":"Julio","full_name":"Barreiro, Julio T"},{"full_name":"Peters, Nicholas A","first_name":"Nicholas","last_name":"Peters"},{"last_name":"Kwiat","first_name":"Paul","full_name":"Kwiat, Paul G"}],"title":"Counterfactual quantum computation through quantum interrogation","extern":1,"publisher":"Nature Publishing Group","abstract":[{"text":"The logic underlying the coherent nature of quantum information processing often deviates from intuitive reasoning, leading to surprising effects. Counterfactual computation constitutes a striking example: the potential outcome of a quantum computation can be inferred, even if the computer is not run 1. Relying on similar arguments to interaction-free measurements 2 (or quantum interrogation3), counterfactual computation is accomplished by putting the computer in a superposition of 'running' and 'not running' states, and then interfering the two histories. Conditional on the as-yet-unknown outcome of the computation, it is sometimes possible to counterfactually infer information about the solution. Here we demonstrate counterfactual computation, implementing Grover's search algorithm with an all-optical approach4. It was believed that the overall probability of such counterfactual inference is intrinsically limited1,5, so that it could not perform better on average than random guesses. However, using a novel 'chained' version of the quantum Zeno effect6, we show how to boost the counterfactual inference probability to unity, thereby beating the random guessing limit. Our methods are general and apply to any physical system, as illustrated by a discussion of trapped-ion systems. Finally, we briefly show that, in certain circumstances, counterfactual computation can eliminate errors induced by decoherence. ","lang":"eng"}],"intvolume":"       439","day":"23","year":"2006","quality_controlled":0,"date_created":"2018-12-11T11:47:18Z","issue":"7079","publist_id":"7235"},{"extern":1,"publisher":"IEEE","conference":{"name":"CLEO/QELS: Conference on Lasers and Electro-Optics / Quantum Electronics and Laser Science Conference"},"abstract":[{"lang":"eng","text":"Visible light photon counters (VLPCs) and solid-state photomultipliers (SSPMs) facilitate efficient single-photon detection. We are attempting to improve their efficiency, previously limited to &lt; 88% by coupling losses, via anti-reflection coatings, better electronics and cryogenics."}],"day":"01","year":"2006","quality_controlled":0,"publist_id":"7232","date_created":"2018-12-11T11:47:19Z","date_updated":"2021-01-12T08:03:43Z","doi":"10.1109/CLEO.2006.4628641","date_published":"2006-01-01T00:00:00Z","publication_status":"published","citation":{"ama":"Rangarajan R, Peters N, Hosten O, Altepeter J, Jeffrey E, Kwiat P. Improved single-photon detection. In: IEEE; 2006. doi:<a href=\"https://doi.org/10.1109/CLEO.2006.4628641\">10.1109/CLEO.2006.4628641</a>","mla":"Rangarajan, Radhika, et al. <i>Improved Single-Photon Detection</i>. IEEE, 2006, doi:<a href=\"https://doi.org/10.1109/CLEO.2006.4628641\">10.1109/CLEO.2006.4628641</a>.","apa":"Rangarajan, R., Peters, N., Hosten, O., Altepeter, J., Jeffrey, E., &#38; Kwiat, P. (2006). Improved single-photon detection. Presented at the CLEO/QELS: Conference on Lasers and Electro-Optics / Quantum Electronics and Laser Science Conference, IEEE. <a href=\"https://doi.org/10.1109/CLEO.2006.4628641\">https://doi.org/10.1109/CLEO.2006.4628641</a>","chicago":"Rangarajan, Radhika, Nicholas Peters, Onur Hosten, Joseph Altepeter, Evan Jeffrey, and Paul Kwiat. “Improved Single-Photon Detection.” IEEE, 2006. <a href=\"https://doi.org/10.1109/CLEO.2006.4628641\">https://doi.org/10.1109/CLEO.2006.4628641</a>.","ieee":"R. Rangarajan, N. Peters, O. Hosten, J. Altepeter, E. Jeffrey, and P. Kwiat, “Improved single-photon detection,” presented at the CLEO/QELS: Conference on Lasers and Electro-Optics / Quantum Electronics and Laser Science Conference, 2006.","ista":"Rangarajan R, Peters N, Hosten O, Altepeter J, Jeffrey E, Kwiat P. 2006. Improved single-photon detection. CLEO/QELS: Conference on Lasers and Electro-Optics / Quantum Electronics and Laser Science Conference.","short":"R. Rangarajan, N. Peters, O. Hosten, J. Altepeter, E. Jeffrey, P. Kwiat, in:, IEEE, 2006."},"month":"01","type":"conference","_id":"583","status":"public","author":[{"last_name":"Rangarajan","first_name":"Radhika","full_name":"Rangarajan, Radhika"},{"full_name":"Peters, Nicholas A","first_name":"Nicholas","last_name":"Peters"},{"first_name":"Onur","last_name":"Hosten","id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2031-204X","full_name":"Onur Hosten"},{"full_name":"Altepeter, Joseph B","last_name":"Altepeter","first_name":"Joseph"},{"full_name":"Jeffrey, Evan R","first_name":"Evan","last_name":"Jeffrey"},{"full_name":"Kwiat, Paul G","last_name":"Kwiat","first_name":"Paul"}],"title":"Improved single-photon detection"},{"_id":"6151","type":"journal_article","user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","language":[{"iso":"eng"}],"author":[{"first_name":"Iris","last_name":"Salecker","full_name":"Salecker, Iris"},{"first_name":"Michael","last_name":"Häusser","full_name":"Häusser, Michael"},{"last_name":"de Bono","first_name":"Mario","id":"4E3FF80E-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8347-0443","full_name":"de Bono, Mario"}],"status":"public","title":"On the axonal road to circuit function and behaviour: Workshop on the assembly and function of neuronal circuits","publication":"EMBO reports","publication_status":"published","date_published":"2006-06-01T00:00:00Z","page":"585-589","date_updated":"2021-01-12T08:06:23Z","doi":"10.1038/sj.embor.7400713","external_id":{"pmid":["16729018"]},"volume":7,"citation":{"mla":"Salecker, Iris, et al. “On the Axonal Road to Circuit Function and Behaviour: Workshop on the Assembly and Function of Neuronal Circuits.” <i>EMBO Reports</i>, vol. 7, no. 6, Wiley, 2006, pp. 585–89, doi:<a href=\"https://doi.org/10.1038/sj.embor.7400713\">10.1038/sj.embor.7400713</a>.","ama":"Salecker I, Häusser M, de Bono M. On the axonal road to circuit function and behaviour: Workshop on the assembly and function of neuronal circuits. <i>EMBO reports</i>. 2006;7(6):585-589. doi:<a href=\"https://doi.org/10.1038/sj.embor.7400713\">10.1038/sj.embor.7400713</a>","ista":"Salecker I, Häusser M, de Bono M. 2006. On the axonal road to circuit function and behaviour: Workshop on the assembly and function of neuronal circuits. EMBO reports. 7(6), 585–589.","short":"I. Salecker, M. Häusser, M. de Bono, EMBO Reports 7 (2006) 585–589.","chicago":"Salecker, Iris, Michael Häusser, and Mario de Bono. “On the Axonal Road to Circuit Function and Behaviour: Workshop on the Assembly and Function of Neuronal Circuits.” <i>EMBO Reports</i>. Wiley, 2006. <a href=\"https://doi.org/10.1038/sj.embor.7400713\">https://doi.org/10.1038/sj.embor.7400713</a>.","ieee":"I. Salecker, M. Häusser, and M. de Bono, “On the axonal road to circuit function and behaviour: Workshop on the assembly and function of neuronal circuits,” <i>EMBO reports</i>, vol. 7, no. 6. Wiley, pp. 585–589, 2006.","apa":"Salecker, I., Häusser, M., &#38; de Bono, M. (2006). On the axonal road to circuit function and behaviour: Workshop on the assembly and function of neuronal circuits. <i>EMBO Reports</i>. Wiley. <a href=\"https://doi.org/10.1038/sj.embor.7400713\">https://doi.org/10.1038/sj.embor.7400713</a>"},"month":"06","day":"01","quality_controlled":"1","oa":1,"oa_version":"Published Version","year":"2006","date_created":"2019-03-21T08:50:43Z","issue":"6","main_file_link":[{"url":"https://europepmc.org/articles/pmc1479602","open_access":"1"}],"pmid":1,"extern":"1","publisher":"Wiley","publication_identifier":{"issn":["1469-221X","1469-3178"]},"intvolume":"         7"},{"day":"04","oa_version":"None","year":"2006","quality_controlled":"1","date_created":"2019-03-21T09:15:27Z","issue":"7","pmid":1,"extern":"1","publisher":"Elsevier","publication_identifier":{"issn":["0960-9822"]},"intvolume":"        16","_id":"6152","type":"journal_article","status":"public","author":[{"full_name":"Rogers, Candida","last_name":"Rogers","first_name":"Candida"},{"full_name":"Persson, Annelie","first_name":"Annelie","last_name":"Persson"},{"first_name":"Benny","last_name":"Cheung","full_name":"Cheung, Benny"},{"id":"4E3FF80E-F248-11E8-B48F-1D18A9856A87","last_name":"de Bono","first_name":"Mario","full_name":"de Bono, Mario","orcid":"0000-0001-8347-0443"}],"language":[{"iso":"eng"}],"user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","title":"Behavioral motifs and neural pathways coordinating O2 responses and aggregation in C. elegans","publication":"Current Biology","date_published":"2006-04-04T00:00:00Z","publication_status":"published","date_updated":"2021-01-12T08:06:23Z","page":"649-659","doi":"10.1016/j.cub.2006.03.023","external_id":{"pmid":["16581509"]},"volume":16,"citation":{"mla":"Rogers, Candida, et al. “Behavioral Motifs and Neural Pathways Coordinating O2 Responses and Aggregation in C. Elegans.” <i>Current Biology</i>, vol. 16, no. 7, Elsevier, 2006, pp. 649–59, doi:<a href=\"https://doi.org/10.1016/j.cub.2006.03.023\">10.1016/j.cub.2006.03.023</a>.","ama":"Rogers C, Persson A, Cheung B, de Bono M. Behavioral motifs and neural pathways coordinating O2 responses and aggregation in C. elegans. <i>Current Biology</i>. 2006;16(7):649-659. doi:<a href=\"https://doi.org/10.1016/j.cub.2006.03.023\">10.1016/j.cub.2006.03.023</a>","short":"C. Rogers, A. Persson, B. Cheung, M. de Bono, Current Biology 16 (2006) 649–659.","ista":"Rogers C, Persson A, Cheung B, de Bono M. 2006. Behavioral motifs and neural pathways coordinating O2 responses and aggregation in C. elegans. Current Biology. 16(7), 649–659.","apa":"Rogers, C., Persson, A., Cheung, B., &#38; de Bono, M. (2006). Behavioral motifs and neural pathways coordinating O2 responses and aggregation in C. elegans. <i>Current Biology</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.cub.2006.03.023\">https://doi.org/10.1016/j.cub.2006.03.023</a>","ieee":"C. Rogers, A. Persson, B. Cheung, and M. de Bono, “Behavioral motifs and neural pathways coordinating O2 responses and aggregation in C. elegans,” <i>Current Biology</i>, vol. 16, no. 7. Elsevier, pp. 649–659, 2006.","chicago":"Rogers, Candida, Annelie Persson, Benny Cheung, and Mario de Bono. “Behavioral Motifs and Neural Pathways Coordinating O2 Responses and Aggregation in C. Elegans.” <i>Current Biology</i>. Elsevier, 2006. <a href=\"https://doi.org/10.1016/j.cub.2006.03.023\">https://doi.org/10.1016/j.cub.2006.03.023</a>."},"month":"04"},{"acknowledgement":"The first author was partly supported by NSF grant DMS-0072675. The second author was partly supported by a VIGRE postdoc under NSF grant number 9983660 to Cornell University.","_id":"1461","type":"journal_article","title":"Intersection forms of toric hyperkähler varieties","status":"public","author":[{"full_name":"Tamas Hausel","last_name":"Hausel","first_name":"Tamas","id":"4A0666D8-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Swartz","first_name":"Edward","full_name":"Swartz, Edward"}],"publication_status":"published","date_published":"2006-08-01T00:00:00Z","publication":"Proceedings of the American Mathematical Society","doi":"10.1090/S0002-9939-06-08248-7","date_updated":"2021-01-12T06:50:54Z","page":"2403 - 2409","volume":134,"month":"08","citation":{"apa":"Hausel, T., &#38; Swartz, E. (2006). Intersection forms of toric hyperkähler varieties. <i>Proceedings of the American Mathematical Society</i>. American Mathematical Society. <a href=\"https://doi.org/10.1090/S0002-9939-06-08248-7\">https://doi.org/10.1090/S0002-9939-06-08248-7</a>","chicago":"Hausel, Tamás, and Edward Swartz. “Intersection Forms of Toric Hyperkähler Varieties.” <i>Proceedings of the American Mathematical Society</i>. American Mathematical Society, 2006. <a href=\"https://doi.org/10.1090/S0002-9939-06-08248-7\">https://doi.org/10.1090/S0002-9939-06-08248-7</a>.","ieee":"T. Hausel and E. Swartz, “Intersection forms of toric hyperkähler varieties,” <i>Proceedings of the American Mathematical Society</i>, vol. 134, no. 8. American Mathematical Society, pp. 2403–2409, 2006.","ista":"Hausel T, Swartz E. 2006. Intersection forms of toric hyperkähler varieties. Proceedings of the American Mathematical Society. 134(8), 2403–2409.","short":"T. Hausel, E. Swartz, Proceedings of the American Mathematical Society 134 (2006) 2403–2409.","ama":"Hausel T, Swartz E. Intersection forms of toric hyperkähler varieties. <i>Proceedings of the American Mathematical Society</i>. 2006;134(8):2403-2409. doi:<a href=\"https://doi.org/10.1090/S0002-9939-06-08248-7\">10.1090/S0002-9939-06-08248-7</a>","mla":"Hausel, Tamás, and Edward Swartz. “Intersection Forms of Toric Hyperkähler Varieties.” <i>Proceedings of the American Mathematical Society</i>, vol. 134, no. 8, American Mathematical Society, 2006, pp. 2403–09, doi:<a href=\"https://doi.org/10.1090/S0002-9939-06-08248-7\">10.1090/S0002-9939-06-08248-7</a>."},"year":"2006","oa":1,"quality_controlled":0,"day":"01","date_created":"2018-12-11T11:52:09Z","publist_id":"5733","main_file_link":[{"open_access":"1","url":"http://arxiv.org/abs/math/0306369"}],"issue":"8","publisher":"American Mathematical Society","extern":1,"abstract":[{"lang":"eng","text":"This note proves combinatorially that the intersection pairing on the middle-dimensional compactly supported cohomology of a toric hyperkähler variety is always definite, providing a large number of non-trivial L 2 harmonic forms for toric hyperkähler metrics on these varieties. This is motivated by a result of Hitchin about the definiteness of the pairing of L 2 harmonic forms on complete hyperkähler manifolds of linear growth."}],"intvolume":"       134"}]