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Search Results: 1 - 10 of 124 matches for " Hartz "
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Hartz Zulmira
Cadernos de Saúde Pública , 1999,
Abstract:
Measurements of B Hadron Properties at the Tevatron
Mark Hartz
Physics , 2008,
Abstract: Recent measurements of B hadron properties carried out in sqrt(s)=1.96 TeV p/p-bar collisions at the Tevatron are reviewed. Included are measurements of the Bc+ meson lifetime, using J/psi+l+X final states, and the mass, using J/psi+pi final states, a flavor specific measurement of the Bs0 lifetime in Ds+pi+X decays, simultaneous measurements of the Bs0 lifetime and lifetime difference in J/psi+phi decays, the first direct evidence and mass measurements of the Xi_b- baryon, and measurements of the polarization of 1S charmonium. For all measurements, charge conjugate modes are included.
On the isomorphism problem for multiplier algebras of Nevanlinna-Pick spaces
Michael Hartz
Mathematics , 2015,
Abstract: We continue the investigation of the isomorphism problem for multiplier algebras of reproducing kernel Hilbert spaces with the complete Nevanlinna-Pick property. In contrast to previous work in this area, we do not study these spaces by identifying them with restrictions of a universal space, namely the Drury-Arveson space. Instead, we work directly with the Hilbert spaces and their reproducing kernels. In particular, we show that two multiplier algebras of Nevanlinna-Pick spaces on the same set are equal if and only if the Hilbert spaces are equal. Most of the article is devoted to the study of a special class of Nevanlinna-Pick spaces on homogeneous varieties. We provide a complete answer to the question of when two multiplier algebras of spaces of this type are algebraically or isometrically isomorphic. This generalizes results of Davidson, Ramsey, Shalit, and the author.
Topological isomorphisms for some universal operator algebras
Michael Hartz
Mathematics , 2012, DOI: 10.1016/j.jfa.2012.08.028
Abstract: Let $I \subset \mathbb C[z_1,...,z_d]$ be a radical homogeneous ideal, and let $\mathcal A_I$ be the norm-closed non-selfadjoint algebra generated by the compressions of the $d$-shift on Drury-Arveson space $H^2_d$ to the co-invariant subspace $H^2_d \ominus I$. Then $\mathcal A_I$ is the universal operator algebra for commuting row contractions subject to the relations in $I$. We ask under which conditions are there topological isomorphisms between two such algebras $\mathcal A_I$ and $\mathcal A_J$? We provide a positive answer to a conjecture of Davidson, Ramsey and Shalit: $\mathcal A_I$ and $\mathcal A_J$ are topologically isomorphic if and only if there is an invertible linear map $A$ on $\mathbb C^d$ which maps the vanishing locus of $J$ isometrically onto the vanishing locus of $I$. Most of the proof is devoted to showing that finite algebraic sums of full Fock spaces over subspaces of $\mathbb C^d$ are closed. This allows us to show that the map $A$ induces a completely bounded isomorphism between $\mathcal A_I$ and $\mathcal A_J$.
Nevanlinna-Pick spaces with hyponormal multiplication operators
Michael Hartz
Mathematics , 2013, DOI: 10.1090/S0002-9939-2015-12373-8
Abstract: We show that the Hardy space on the unit disk is the only non-trivial irreducible reproducing kernel Hilbert space which satisfies the complete Nevanlinna-Pick property and hyponormality of all multiplication operators.
Von Neumann's inequality for commuting weighted shifts
Michael Hartz
Mathematics , 2015,
Abstract: We show that every multivariable contractive weighted shift dilates to a tuple of commuting unitaries, and hence satisfies von Neumann's inequality. This answers a question of Lubin and Shields. We also exhibit a closely related $3$-tuple of commuting contractions, similar to Parrott's example, which does not dilate to a $3$-tuple of commuting unitaries.
Why is greater medication adherence associated with better outcomes
Arthur Hartz, Tao He
Emerging Themes in Epidemiology , 2013, DOI: 10.1186/1742-7622-10-1
Abstract: The three explanations evaluated were that subjects with greater placebo adherence were 1) more likely to adhere to other medications, 2) had better healthcare behaviors, and 3) had lower risk. The data included more than 800 risk factors from the Women's Health Initiative (WHI), a nationwide study that included women who participated in randomized controlled trials of estrogen plus progestin (n=16,608) or estrogen alone (n=10,739). The median follow-up was 8 years. Linear regression was used to identify factors that predict adherence, and the Cox model was used to test the association between adherence and outcomes with and without adjusting for other risk factors.Greater adherence to placebo was not associated with colon cancer but was substantially and significantly associated with several diverse outcomes: death, myocardial infarction, stroke, and breast cancer. Adherence to hormone therapy had a significantly weaker association with outcomes than placebo adherence. The WHI risk factors only poorly predicted adherence, R2 < 4%, and did not account for the association between placebo adherence and outcome.The results suggest that adherence to placebo is a marker for important risk factors that were not measured by WHI. Once identified these risk factors may be used to increase the validity of observational studies of medical treatment by reducing unmeasured confounding.
Institutionalizing the evaluation of health programs and policies in France: cuisine internationale over fast food and sur mesure over ready-made
Hartz, Zulmira M. A.;
Cadernos de Saúde Pública , 1999, DOI: 10.1590/S0102-311X1999000200002
Abstract: the purpose of this article is to describe several chronological milestones in institutionalizing the evaluation of public programs and policies in france from a governmental perspective and in the health sector, situating such references in the international context. the institutional nature of evaluation implies integrating it into an action-oriented model, linking analytical activities to management, thus constituting the formulation of an evaluation policy for policy evaluation. the study focuses on issues related to the structure, practice, and utilization of evaluation results as well as other characteristics providing the french model with a certain resistance to traditional "fast-food" or "ready-made" methodological approaches. the institutionalization of sectorial evaluation appears more promising than that of the government's centralized channel, despite the work developed by a scientific evaluation council, and suggests avenues for reflection and debate pertaining to the brazilian unified health system.
Reaching out and reaching across: Collections and social inclusion
Phaedra Livingstone,Jill Hartz
University Museums and Collections Journal , 2010,
Abstract: This paper discusses the ongoing efforts of the Jordan Schnitzer Museum of Art, at the University of Oregon, to diversify itself and the publics it serves through programming, community outreach, institutional change and collection development. The JSMA has prioritized the building and sustaining of diverse publics in fulfillment of its new, more inclusive mission and in recognition of the growing and significant presence of Latin American and Asian/Asian American constituents in the region and state, including the university. With an Asian collection formed more than 75 years ago and given to the university to bridge cross-cultural understanding and create a more peaceful world, the JSMA is uniquely positioned to be a vital and relevant art museum for new generations of K-12 and university students and area residents. Increasing audience diversity and availing the collections for cross-curricular teaching, research and community outreach were embraced as key priorities in 2008-2009 strategic planning. Through acquisitions, cross-curricular teaching, research, advisory committees, and community outreach (key priorities in JSMA's strategic plan), the JSMA also furthers the university's diversity goals and seeks to build new audiences for the visual arts.
Institutionalizing the evaluation of health programs and policies in France: cuisine internationale over fast food and sur mesure over ready-made
Hartz Zulmira M. A.
Cadernos de Saúde Pública , 1999,
Abstract: The purpose of this article is to describe several chronological milestones in institutionalizing the evaluation of public programs and policies in France from a governmental perspective and in the health sector, situating such references in the international context. The institutional nature of evaluation implies integrating it into an action-oriented model, linking analytical activities to management, thus constituting the formulation of an evaluation policy for policy evaluation. The study focuses on issues related to the structure, practice, and utilization of evaluation results as well as other characteristics providing the French model with a certain resistance to traditional "fast-food" or "ready-made" methodological approaches. The institutionalization of sectorial evaluation appears more promising than that of the government's centralized channel, despite the work developed by a Scientific Evaluation Council, and suggests avenues for reflection and debate pertaining to the Brazilian Unified Health System.
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