Faculty Scholarship
Showing 431 - 440 of 733 Items
Inclusive decay B→ηX
Date: 1996-01-01
Creator: Y. Kubota, M. Lattery, M. Momayezi, J. K. Nelson, S., Patton, R. Poling, V. Savinov, S. Schrenk, R. Wang, M. S. Alam, I. J. Kim, Z. Ling, A. H. Mahmood, J. J. O’Neill, H. Severini, C. R. Sun, F. Wappler, G. Crawford, C. M. Daubenmier, R. Fulton, D. Fujino, K. K. Gan, K. Honscheid, H. Kagan, R. Kass, J. Lee, M. Sung, C. White, A. Wolf, M. M. Zoeller, F. Butler
Access: Open access
- Using data samples taken at the Υ(4S) resonance and nearby continuum e+e- annihilation with the CLEO-II detector at CESR, we have measured the inclusive branching fraction B(B→ηX)=(17.6±1.1±1.2)%, and the momentum distribution of the η mesons from B meson decay. The η yield cannot be explained as arising solely from the decay of intermediate charmed mesons. © 1996 The American Physical Society.
The structure of singularities in Π-minimizing networks in R2
Date: 1991-01-01
Creator: M. Alfaro, M. Conger, K. Hodges, A. Levy, R., Kochar, L. Kuklinski
Access: Open access
Two antisymmetric hypermultiplets in N = 2 SU(N) gauge theory: Seiberg-Witten curve and M-theory interpretation
Date: 1999-10-04
Creator: Isabel P. Ennes, Stephen G. Naculich, Henric Rhedin, Howard J. Schnitzer
Access: Open access
- The one-instanton contribution to the prepotential for N = 2 supersymmetric gauge theories with classical groups exhibits a universality of form. We extrapolate the observed regularity to SU (N) gauge theory with two antisymmetric hypermultiplets and Nf ≤ 3 hypermultiplets in the defining representation. Using methods developed for the instanton expansion of non-hyperelliptic curves, we construct an effective quartic Seiberg-Witten curve that generates this one-instanton prepotential. We then interpret this curve in terms of an M-theoretic picture involving NS 5-branes, D4-branes, D6-branes, and orientifold sixplanes, and show that for consistency, an infinite chain of 5-branes and orientifold sixplanes is required, corresponding to a curve of infinite order. © 1999 Elsevier Science B.V. All rights reserved.
Superconformal coset equivalence from level-rank duality
Date: 1997-11-17
Creator: Stephen G. Naculich, Howard J. Schnitzer
Access: Open access
- We construct a one-to-one map between the primary fields of the N = 2 superconformal Kazama-Suzuki models G(m, n, k) and G(k, n, m) based on complex Grassmannian cosets, using level-rank duality of Wess-Zumino-Witten models. We then show that conformal weights, superconformal U(1) charges, modular transformation matrices, and fusion rules are preserved under this map, providing strong evidence for the equivalence of these coset models. © 1997 Elsevier Science B.V.
Luminosity measurement with the CLEO II detector
Date: 1994-07-01
Creator: G. Crawford, C. M. Daubenmier, R. Fulton, D. Fujino, K. K., Gan, K. Honscheid, H. Kagan, R. Kass, J. Lee, R. Malchow, Y. Skovpen, M. Sung, C. White, F. Butler, X. Fu, G. Kalbfleisch, W. R. Ross, P. Skubic, M. Wood, J. Fast, R. L. McIlwain, T. Miao, D. H. Miller, M. Modesitt, D. Payne, E. I. Shibata, I. P.J. Shipsey, P. N. Wang, M. Battle, J. Ernst, L. Gibbons
Access: Open access
- A measurement of absolute integrated luminosity is presented using the CLEO II detector operating at the CESR e+e- storage ring. Independent analyses of three different final states (e+e-, γγ, and μ+μ-) at √s {reversed tilde equals} 10 GeV normalize to the expected theoretical cross sections and correct for detection efficiencies. The resulting luminosities are measured with systematic errors of ±1.8%, ±1.6%, and ±2.2%, respectively, and are consistent with one another. The combined luminosity has a systematic error of ±1.0%. © 1994.
Study of the decay Λc+→λl+νl
Date: 1994-03-10
Creator: T. Bergfeld, B. I. Eisenstein, G. Gollin, B. Ong, M., Palmer, M. Selen, J. J. Thaler, A. J. Sadoff, R. Ammar, S. Ball, P. Baringer, A. Bean, D. Besson, D. Coppage, N. Copty, R. Davis, N. Hancock, M. Kelly, N. Kwak, H. Lam, Y. Kubota, M. Lattery, J. K. Nelson, D. Patton, D. Perticone, R. Poling, V. Savinov, S. Schrenk, R. Wang, M. S. Alam, I. J. Kim
Access: Open access
- Using the CLEO II detector at CESR we observe 500 Λl+ pairs consistent with the semileptonic decay Λc+ → λ+ν We measure σ(e+e- → Λ+cX) · B(Λ+c → Λl+νl) = 4.77±0.25±0.66 pb. Combining with the charm semileptonic width and the lifetime of the Λc we also obtain B(Λ+c → pK-π+). We find no evidence for Λl+νl final states in which there are additional Λ+c decay products. We measure the decay asymmetry parameter of Λ+c → Λe+νe to be αΛc = -0.89+0.17+0.09-0.11-0.05. © 1994.
Oil and indigenous people in sub-Arctic Russia: Rethinking equity and governance in benefit sharing agreements
Date: 2018-03-01
Creator: Maria Tysiachniouk, Laura A. Henry, Machiel Lamers, Jan P.M. van Tatenhove
Access: Open access
- How can the interests of extractive industries and indigenous communities in the Arctic be balanced through benefit sharing policies? This paper analyses how the international oil consortia of Sakhalin Energy and Exxon Neftegaz Limited (ENL) on Sakhalin Island in Russia have introduced benefit sharing through tripartite partnerships. We demonstrate that the procedural and distributional equity of benefit sharing depend on corporate policies, global standards, pressure from international financial institutions, and local social movements connected in a governance generating network. Sakhalin Energy was profoundly influenced by international financial institutions’ global rules related to environmental and indigenous people's interests. The benefit sharing arrangement that evolved under these influences resulted in enhanced procedural equity for indigenous people, but has not prevented conflict with and within communities. In contrast, ENL was not significantly influenced by international financial institutions. Its more flexible and limited benefit sharing arrangement was shaped predominantly by global corporate policies, pressure from the regional government and the influence of Sakhalin Energy's model. The paper closes with policy recommendations on benefit sharing arrangements between extractive industries and indigenous communities across Arctic states that could be further developed by the Arctic Council Sustainable Development Working Group.
Accelerating change: The power of faculty change agents to promote diversity and inclusive teaching practices
Date: 2019-10-02
Creator: R. Heather Macdonald, Rachel J. Beane, Eric M.D. Baer, Pamela L. Eddy, Norlene R., Emerson, Jan Hodder, Ellen R. Iverson, John R. McDaris, Kristin O’Connell, Carol J. Ormand
Access: Open access
- Faculty play an important role in attracting students to the geosciences, helping them to thrive in geoscience programs, and preparing them for careers. Thus, faculty have the responsibility to work toward broadening participation in the geosciences by implementing equitable and inclusive practices in their teaching and their programs. Faculty professional development that promotes diversity and inclusion is one way to move evidence-based practices into wider use. The adoption of these practices may be accelerated through a professional development diffusion model that amplifies the impacts through the work of faculty change agents. An example of this approach is the SAGE 2YC professional development program, in which faculty change agents learn and practice strategies during workshop sessions, implement changes in their own teaching, and then work in teams to lead workshops in their region under the auspices of the national program. Although this example focuses on two-year colleges, the model is applicable to faculty professional development more broadly. The success of the model is due in large part to a suite of leader-developed workshop sessions and curated resources that change agent teams may select and adapt for the regional workshops they lead. Furthermore, change agents are trusted colleagues, which makes adoption of the evidence-based practices by regional workshop participants more likely. Increased adoption of a change agent approach to faculty development will support the creation and sharing of additional resources, leading to wider diffusion and implementation of inclusive teaching practices.
Making predictions in an uncertain world: Environmental structure and cognitive maps
Date: 1999-01-01
Creator: Eric Chown
Access: Open access
- This article examines the relationship between environmental and cognitive structure. One of the key tasks for any agent interacting in the real world is the management of uncertainty; because of this the cognitive structures which interact with real environments, such as would be used in navigation, must effectively cope with the uncertainty inherent in a constantly changing world. Despite this uncertainty, however, real environments usually afford structure that can be effectively exploited by organisms. The article examines environmental characteristics and structures that enable humans to survive and thrive in a wide range of real environments. The relationship between these characteristics and structures, uncertainty, and cognitive structure is explored in the context of PLAN, a proposed model of human cognitive mapping, and R-PLAN, a version of PLAN that has been instantiated on an actual mobile robot. An examination of these models helps to provide insight into environmental characteristics which impact human performance on tasks which require interaction with the world. Copyright 1999 International Society for Adaptive Behavior.
Green Icebergs Revisited
Date: 2019-02-01
Creator: Stephen G. Warren, Collin S. Roesler, Richard E. Brandt, Mark Curran
Access: Open access
- Ice crystals form in supercooled seawater beneath several Antarctic ice shelves; as they rise to the ice-shelf base they scavenge particles from the water and incorporate them into the growing basal ice. The resulting marine ice can be ~100 m thick; it differs from sea ice in that it is clear, desalinated, and bubble-free. Icebergs of marine ice vary in color from blue to green, depending on the nature and abundance of foreign constituents in the seawater that became trapped in the ice as it grew. A red or yellow material (i.e., one that absorbs blue light), in combination with the blue of ice, can shift the wavelength of minimum absorption to green. Previously, dissolved organic carbon (DOC) had been proposed to be responsible for the green color. Subsequent measurements of low DOC values in green icebergs, together with the recent finding of large concentrations of iron in marine ice from the Amery Ice Shelf, suggest that the color of green icebergs is caused more by iron-oxide minerals than by DOC. These icebergs travel great distances from their origin; when they melt they can deliver iron as a nutrient to the Southern Ocean.