Recollections of Professor Otto Meyerhof

Professor Meyerhof\u27s laboratory represented the Institute approach with all of the workers devoting their attention to the several aspects of the single problem of muscle metabolism. The number of papers (Meyerhof, 1930) and the great contributions from this laboratory represent the results of the dominant personality of one man. The tributes (Nachmansohn, 1950) paid to him in 1950 were published in Metabolism and Function. Comparable tributes are now being given to Dr. Fischer upon his retirement

A natural simple projection with norm ⩽ √n

AbstractLet V be an n-dimensional subspace of a Banach space X. There is a natural, easily constructed projection from X onto V with norm ⩽ √n

Minnesota Youth in Care: Voices of Wisdom

Adolescents currently make up the largest proportion of young people entering substitute care in the state of Minnesota. In this exploratory project, eleven young adults with a history of out of home placement in two Minnesota counties were interviewed. Participants shared their perceptions on the degree of influence they feel they had when decisions regarding their placements were made. They provided advice for youth currently entering the system and for practitioners working with adolescents in care. A review of the literature exploring the relationship between empowerment theories and youth participation in service provision provides a foundation for the study. Literature on psychosocial development in adolescence is reviewed and related to potential developmental benefits available to young people from care when they are provided with a wider range of opportunities for active participation in decisions about their care

EFFICIENT ANALYTIC COMPUTATION OF HIGHER-ORDER QCD AMPLITUDES

We review techniques simplifying the analytic calculation of one-loop QCD amplitudes with many external legs, for use in next-to-leading-order corrections to multi-jet processes. Particularly useful are the constraints imposed by perturbative unitarity, collinear singularities and a supersymmetry-inspired organization of helicity amplitudes. Certain sequences of one-loop helicity amplitudes with an arbitrary number of external gluons have been obtained using these constraints.Comment: Talk given at Beyond the Standard Model IV, December 13-18 1994, Lake Tahoe, CA. Latex, 4 pages, no figures

Path-Integral Quantization of the (2,2) String

A complete treatment of the (2,2) NSR string in flat (2+2) dimensional space-time is given, from the formal path integral over N=2 super Riemann surfaces to the computational recipe for amplitudes at any loop or gauge instanton number. We perform in detail the superconformal gauge fixing, discuss the spectral flow, and analyze the supermoduli space with emphasis on the gauge moduli. Background gauge field configurations in all instanton sectors are constructed. We develop chiral bosonization on punctured higher-genus surfaces in the presence of gauge moduli and instantons. The BRST cohomology is recapitulated, with a new space-time interpretation for picture-changing. We point out two ways of combining left- and right-movers, which lead to different three-point functions.Comment: 36 pages, LaTeX; published version (typos & eq.(7.12) corrected

The quality of advice provided by pharmacists to patients taking direct oral anticoagulants: A mystery shopper study

Pharmacists report being less confident in their knowledge of direct acting oral anticoagulants (DOACs) than of vitamin K antagonists, which may influence their ability to detect and manage complications arising from DOAC use. In a mystery shopper study, patient agents were sent into community pharmacies with symptom or product-related requests related to common complications that might arise during treatment with oral anticoagulants, with each visit being assessed for the preferred outcome. Only 10/41 (24.4%) visits resulted in the preferred outcome. A complete history-taking process, obtaining a medical history, patient characteristics and pharmacist involvement were strong predictors of the preferred outcome being achieved. The preferred outcome was not consistently achieved without pharmacist involvement. The potential for strategies that support comprehensive pharmacist involvement in over-the-counter requests should be considered to ensure the provision of optimal care to patients taking high-risk medications such as DOACs

Three-dimensional subspace of l∞(5) with maximal projection constant

AbstractLet V be an n-dimensional real Banach space and let λ(V) denote its absolute projection constant. For any N∈N, N⩾n, defineλnN=sup{λ(V):dim(V)=n,V⊂l∞(N)} andλn=sup{λ(V):dim(V)=n}. A well-known Grünbaum conjecture (p. 465 in [B. Grünbaum, Projection constants, Trans. Amer. Math. Soc. 95 (1960) 451–465]) says thatλ2=4/3. In this paper we show thatλ35=5+427 and we determine a three-dimensional space V⊂l∞(5) satisfying λ35=λ(V). In particular, this shows that Proposition 3.1 from [H. König, N. Tomczak-Jaegermann, Norms of minimal projections, J. Funct. Anal. 119 (1994) 253–280] (see p. 259) is incorrect. Hence the proof of the Grünbaum conjecture given in [H. König, N. Tomczak-Jaegermann, Norms of minimal projections, J. Funct. Anal. 119 (1994) 253–280] which is based on Proposition 3.1 is incomplete

High single-mode power conversion efficiency vertical-cavity top-surface-emitting lasers

Includes bibliographical references.We report advances in the power conversion (wall-plug) efficiency of vertical-cavity top-surface-emitting lasers. The devices were fabricated from molecular beam epitaxial layers using deep proton implants to define gain-guided lasers. The epitaxial structure included low resistance, piecewise linearly graded n-type and p-type mirrors, a triple In0.2Ga0.8As quantum-well active region, and a delta-doped contact layer. Power conversion efficiencies as high as 12.7% for continuous-wave single-mode operation were measured after several hours of device operation.This work was supported by the U.S. Department of Energy under Contract DE-AC04-76DP00789