Weinberger

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform

Sharon Weinberger - One of the best experts on this subject based on the ideXlab platform.

Thomas Schick - One of the best experts on this subject based on the ideXlab platform.

  • On an Index Theorem of Chang, Weinberger and Yu.
    arXiv: K-Theory and Homology, 2018
    Co-Authors: Thomas Schick, Mehran Seyedhosseini
    Abstract:

    In this paper we prove a strengthening of a theorem of Chang, Weinberger and Yu on obstructions to the existence of positive scalar curvature metrics on compact manifolds with boundary. They construct a relative index for the Dirac operator, which lives in a relative K-theory group, measuring the difference between the fundamental group of the boundary and of the full manifold. Whenever the Riemannian metric has product structure and positive scalar curvature near the boundary, one can define an absolute index of the Dirac operator taking value in the K-theory of the C*-algebra of fundamental group of the full manifold. This index depends on the metric near the boundary. We prove that the relative index of Chang, Weinberger and Yu is the image of this absolute index under the canonical map of K-theory groups. This has the immediate corollary that positive scalar curvature on the whole manifold implies vanishing of the relative index, giving a conceptual and direct proof of the vanishing theorem of Chang, Weinberger, and Yu. To take the fundamental groups of the manifold and its boundary into account requires working with maximal C* completions of the involved *-algebras. A significant part of this paper is devoted to foundational results regarding these completions.

  • spaces with vanishing l2 homology and their fundamental groups after farber and Weinberger
    Geometriae Dedicata, 2001
    Co-Authors: Nigel Higson, John Roe, Thomas Schick
    Abstract:

    We characterize those groups which can occur as the fundamental groups of finite CW-complexes with vanishing l2-homology (the first examples of such groups were obtained by Farber and Weinberger).

  • Spaces with Vanishing ℓ2-Homology and their Fundamental Groups (after Farber and Weinberger)
    Geometriae Dedicata, 2001
    Co-Authors: Nigel Higson, John Roe, Thomas Schick
    Abstract:

    We characterize those groups which can occur as the fundamental groups of finite CW-complexes with vanishing l2-homology (the first examples of such groups were obtained by Farber and Weinberger).

Alexandra Stara - One of the best experts on this subject based on the ideXlab platform.

  • ‘Making Strange’: The Photography of Steffi Klenz and Thomas Weinberger
    History of Photography, 2013
    Co-Authors: Alexandra Stara
    Abstract:

    This paper discusses the work of the contemporary German-born artists Steffi Klenz and Thomas Weinberger, who share an interest in ‘making strange’ as a device for bringing to visibility the processes that shape our environment. Klenz and Weinberger belong to a generation of young photographers who, across a considerable variety of subject matter and technique, have been challenging the categories of ‘urban’ and ‘landscape’; they have also been investing in processes of ambiguation through their work, offering an open space for the viewer's own projection and engagement. Quite distinct in focus and technique, Klenz and Weinberger turn away from urban life as action in order to meditate on the spaces where it unfolds. Their work shows complex modes of construction, appropriation and destruction of contemporary urban landscapes and their representations. The work of the two artists is discussed alongside ideas of the homely and the strange as devices of re-cognition, and is situated in the context of contem...

  • Making strange in urban landscape photography: the work of Steffi Klenz and Thomas Weinberger
    2010
    Co-Authors: Alexandra Stara
    Abstract:

    This paper discusses the work of artists Steffi Klenz (b. 1979) and Thomas Weinberger (b. 1964), who share a sustained interest in ‘making strange’ as a device for bringing to visibility the processes that shape our environment. Klenz and Weinberger are among a younger generation of photographers who, across considerable variety of subject matter and technique, have been challenging the categories of ‘urban’ and ‘landscape’ and investing in processes of ambiguation through their work, offering an open space for the viewer’s own projection and engagement. Quite distinct in their specific focus and technique, Klenz and Weinberger turn away from urban life as action, in order to meditate on the spaces where it unfolds. Their work shows complex modes of construction, appropriation and destruction of contemporary urban landscapes and their representations. The work of the two artists will be discussed alongside ideas of the homely and the strange as devices of re-cognition, and will be situated in the context of contemporary photographic practice that rethinks the way we look at our environment.

Kristin L. Ahlberg - One of the best experts on this subject based on the ideXlab platform.

  • Reagan on War: A Reappraisal of the Weinberger Doctrine, 1980-1984
    Presidential Studies Quarterly, 2014
    Co-Authors: Kristin L. Ahlberg
    Abstract:

    Reagan on War: A Reappraisal of the Weinberger Doctrine, 1980-1984. By Gail E. S. Yoshitani. College Station: Texas A & M University Press, 2012. 250 pp. On November 28, 1984, Secretary of Defense Caspar Weinberger spoke before the National Press Club and elucidated six "tests" for policy makers to use when weighing U.S. military involvement. In committing forces abroad, administration officials needed to ascertain if the commitment proved vital to national interests, positioned the United States for victory, reflected clear political and military objectives, allowed for the continual adjustment of the relationship between objectives and force, enjoyed the support of Congress and the American public, and placed the use of military force as a last resort. In Reagan on War: A Reappraisal of the Weinberger Doctrine, 1980-1984, Professor Gail E. S. Yoshitani asserts that while, at the time, observers viewed the Weinberger Doctrine as "restrictive and a departure," in terms of Ronald Reagan's foreign policy, the doctrine "codified principles" Reagan and his advisors had internalized from the beginning of Reagan's first term "in deciding when and how to use military force" (p. xiii). The doctrine's importance lay in its interpretation of civil-military relations, one that "synthesized the administration's concerns about potential threats and requirements of world involvement with domestic political realities and social norms" (p. 114). Yoshitani traces the origins of the Weinberger Doctrine by describing Reagan's early efforts in articulating a foreign policy before she develops three case studies that demonstrate the administration's application of force. Reagan's 1981 inaugural address illustrated his desire to reclaim America's global role in the wake of the Iranian hostage crisis and the Soviet invasion ol Afghanistan. Reagan asserted that his foreign policy would restore "confidence" in U.S. leadership and would promote peace and stability (p. 8). Reagan also intertwined peace with strength. During the early months of 1981, Reagan, Weinberger, Secretary of State Alexander Haig, and other officials grappled with the form American strength should assume: would the military function as a "tool of last resort" after other political or economic approaches had been exhausted, or would it be deployed as a critical component of diplomacy? Yoshitani places this internal and ongoing administration debate within a larger historical examination of civil-military relations, noting that during the second half of the twentieth century, domestic political realities influenced the ways in which Americans conceptualized both foreign policy and the use of force to achieve political objectives. By 1981, the mid-century domestic political consensus had dissolved, executive branch primacy in the conduct of foreign policy had been limited or curtailed, and profound disillusionment concerning traditional political institutions had intensified. …

Nigel Higson - One of the best experts on this subject based on the ideXlab platform.

Related terms

Weinberger - 15 days free trial to Access Experts & Abstracts