The Effect of Frequent Managerial Turnover on Organizational Performance: A Study of Professional Baseball Managers

This analysis is designed to study the question of a manager’s contribution to the organization, particularly in terms of uncertainty related to managerial succession. The theory of managerial succession, which is the replacement of one public manager with another, suggests a negative relationship between change and organizational performance. Organizations’ decision to change managers more often exacerbates the negative effect on performance. The hypotheses are tested using baseball managers as proxies for public managers, as they perform similar duties, have similar goals, and operate under similar constraints. The results suggest that managerial succession has a negative effect on organizational performance. Frequent succession events also have a negative effect on performance, although the relationship is non-linear in nature

Demonstration of non-Markovian process characterisation and control on a quantum processor

In the scale-up of quantum computers, the framework underpinning fault-tolerance generally relies on the strong assumption that environmental noise affecting qubit logic is uncorrelated (Markovian). However, as physical devices progress well into the complex multi-qubit regime, attention is turning to understanding the appearance and mitigation of correlated -- or non-Markovian -- noise, which poses a serious challenge to the progression of quantum technology. This error type has previously remained elusive to characterisation techniques. Here, we develop a framework for characterising non-Markovian dynamics in quantum systems and experimentally test it on multi-qubit superconducting quantum devices. Where noisy processes cannot be accounted for using standard Markovian techniques, our reconstruction predicts the behaviour of the devices with an infidelity of $10^{-3}$. Our results show this characterisation technique leads to superior quantum control and extension of coherence time by effective decoupling from the non-Markovian environment. This framework, validated by our results, is applicable to any controlled quantum device and offers a significant step towards optimal device operation and noise reduction

Treasure Valley State of the Region: Progress Report 2008

The original Treasure Valley State of the Region Report (2006) describes the Boise- Nampa MSA using 49 indicators on social, economic, fiscal and environmental aspects of the region. Comparisons using the indicators are also made with peer regions in the Western United States. The rapid increase in growth in the Treasure Valley warrants a comprehensive look at the region. The Public Policy Center in the College of Social Science and Public Affairs at Boise State University initiated the production of this report to meet this need. This report was assembled by faculty and graduate students in an effort to produce a fact based report using region wide data. It was also assembled as a starting point for understanding some of the issues and opportunities we face now and in the future. The Progress Report 2008 is an effort to update many of the indicators presented in the Preliminary Report, and add new indicators based on feedback we received from the community. In the Progress Report, we include all of the original graphs, tables and indicator information, as well as updated graphs, tables and discussion where we found relevant data.1 More importantly, the Progress Report is designed to present to the readers an opportunity to evaluate the changes the region has made over time, and provide opportunity for dialogue on the effects of these changes

Ultralight Scalars and Spiral Galaxies

We study some possible astrophysical implications of a very weakly coupled ultralight dilaton-type scalar field. Such a field may develop an (approximately stable) network of domain walls. The domain wall thickness is assumed to be comparable with the thickness of the luminous part of the spiral galaxies. The walls provide trapping for galactic matter. This is used to motivate the very existence of the spiral galaxies. A zero mode existing on the domain wall is a massless scalar particle confined to 1+2 dimensions. At distances much larger than the galaxy/wall thickness, the zero-mode exchange generates a logarithmic potential, acting as an additional term with respect to Newton's gravity. The logarithmic term naturally leads to constant rotational velocities at the periphery. We estimate the scalar field coupling to the matter energy-momentum tensor needed to fit the observable flat rotational curves of the spiral galaxies. The value of this coupling turns out to be reasonable -- we find no contradiction with the existing data.Comment: 19 pages, 2 eps figures; extra references and two important Comments adde

Neutrophils promote CXCR3-dependent itch in the development of atopic dermatitis.

Chronic itch remains a highly prevalent disorder with limited treatment options. Most chronic itch diseases are thought to be driven by both the nervous and immune systems, but the fundamental molecular and cellular interactions that trigger the development of itch and the acute-to-chronic itch transition remain unknown. Here, we show that skin-infiltrating neutrophils are key initiators of itch in atopic dermatitis, the most prevalent chronic itch disorder. Neutrophil depletion significantly attenuated itch-evoked scratching in a mouse model of atopic dermatitis. Neutrophils were also required for several key hallmarks of chronic itch, including skin hyperinnervation, enhanced expression of itch signaling molecules, and upregulation of inflammatory cytokines, activity-induced genes, and markers of neuropathic itch. Finally, we demonstrate that neutrophils are required for induction of CXCL10, a ligand of the CXCR3 receptor that promotes itch via activation of sensory neurons, and we find that that CXCR3 antagonism attenuates chronic itch

Non-Markovian Quantum Process Tomography

Characterisation protocols have so far played a central role in the development of noisy intermediate-scale quantum (NISQ) computers capable of impressive quantum feats. This trajectory is expected to continue in building the next generation of devices: ones that can surpass classical computers for particular tasks -- but progress in characterisation must keep up with the complexities of intricate device noise. A missing piece in the zoo of characterisation procedures is tomography which can completely describe non-Markovian dynamics. Here, we formally introduce a generalisation of quantum process tomography, which we call process tensor tomography. We detail the experimental requirements, construct the necessary post-processing algorithms for maximum-likelihood estimation, outline the best-practice aspects for accurate results, and make the procedure efficient for low-memory processes. The characterisation is the pathway to diagnostics and informed control of correlated noise. As an example application of the technique, we improve multi-time circuit fidelities on IBM Quantum devices for both standalone qubits and in the presence of crosstalk to a level comparable with the fault-tolerant noise threshold in a variety of different noise conditions. Our methods could form the core for carefully developed software that may help hardware consistently pass the fault-tolerant noise threshold