Statistical modeling of bowing control applied to violin sound synthesis

Excitation-continuous music instrument control patterns are often not explicitly represented in current sound synthesis techniques when applied to automatic performance. Both physical model-based and sample-based synthesis paradigmswould benefit from a flexible and accurate instrument control model, enabling the improvement of naturalness and realism. Wepresent a framework for modeling bowing control parameters inviolin performance. Nearly non-intrusive sensing techniques allow for accurate acquisition of relevant timbre-related bowing control parameter signals.We model the temporal contour of bow velocity, bow pressing force, and bow-bridge distance as sequences of short Bézier cubic curve segments. Considering different articulations, dynamics, and performance contexts, a number of note classes are defined. Contours of bowing parameters in a performance database are analyzed at note-level by following a predefined grammar that dictates characteristics of curve segment sequences for each of the classes in consideration. As a result, contour analysis of bowing parameters of each note yields an optimal representation vector that is sufficient for reconstructing original contours with significant fidelity. From the resulting representation vectors, we construct a statistical model based on Gaussian mixtures suitable for both the analysis and synthesis of bowing parameter contours. By using the estimated models, synthetic contours can be generated through a bow planning algorithm able to reproduce possible constraints caused by the finite length of the bow. Rendered contours are successfully used in two preliminary synthesis frameworks: digital waveguide-based bowed stringphysical modeling and sample-based spectral-domain synthesis.

Issue review : income surtaxes.

School districts can use income surtax as a replacement for local property taxes to fund specific, discretionary education programs. This issue review provides an overview of the local income surtax and the potential impact of allowing other local governments to replace property tax with income surtax.

Issue review : school aid law changes.

This issue review examines law changes made during the past three legislative sessions, 2006 through 2008, that directly impact the Iowa School Aid Formula.

Issue review : county jails and probation sentencing.

This issue review provides a description of the use and funding of county jails and the potential budget impact if the state were to fund the cost of housing probationers.

Issue review : electronic document management system or EDMS.

This issue review provides an overview of the electronic documents management system, or EDMS project.

Issue review : Iowa State Patrol airplane and vehicle fleet.

This issue review provides information about the Iowa State Patrol's general fund budget; specifically, vehicle depreciation and fuel expenses.

Issue review : sex offender registry.

This issue review provides a description of Iowa's 200-foot residency restriction for sex offenders and the impact on the corrections system.

Diabetes care: opinions, needs and proposed solutions of Swiss patients and healthcare professionals: a qualitative study.

AIMS: To explore, both among patients with diabetes and healthcare professionals, opinions on current diabetes care and the development of the "Regional Diabetes Program". METHODS: We employed qualitative methods (focus groups - FG) and used purposive sampling strategy to recruit patients with diabetes and healthcare professionals. We conducted one diabetic and one professional FG in each of the four health regions of the canton of Vaud/Switzerland. The eight FGs were audio-taped and transcribed verbatim. Thematic analysis was then undertaken. RESULTS: Results showed variability in the perception of the quality of diabetes care, pointed to insufficient information regarding diabetes, and lack of collaboration. Participants also evoked patients' difficulties for self-management, as well as professionals' and patients' financial concerns. Proposed solutions included reinforcing existing structures, developing self-management education, and focusing on comprehensive and coordinated care, communication and teamwork. Patients and professionals were in favour of a "Regional Diabetes Program" tailored to the actors' needs, and viewed it as a means to reinforce existing care delivery. CONCLUSIONS: Patients and professionals pointed out similar problems and solutions but explored them differently. Combined with coming quantitative data, these results should help to further develop, adapt and implement the "Regional Diabetes Program".

Issue review : city property tax for fiscal year 2009.

This issue review provides fiscal year 2009 city taxable value, tax rate and property tax revenue statistics, with comparisons to FY 2008 and to FY 2001. A discussion of the impact of the residential rollback on the tax base of cities and the growth in tax increment financing, or TIF, is also included.

Issue review : impact on the insurance premium tax rate reduction .

In 2002, Senate File 2318, Insurance Premium Tax Reduction Act, the Iowa General Assembly approved a reduction in the insurance premium tax rate from 2 percent to 1 percent. The reduction was phased in at the rate of 1/4 percent annual increments over a five-year period, beginning with life and health insurance policy payments made on or after January 1st, 2003. Calendar year 2007 was the first year all premiums were taxed at 1 percent and fiscal year 2008 was the first full fiscal year at the 1 percent rate. Insurance premiums tax is paid only by insurance companies. The companies that benefit from the tax reduction are uniquely identified in government employment statistics. This allows for a unique opportunity to evaluate both the revenue impact and the employment impact of the tax rate reduction in Senate File 2318. This issue review focuses on the General Fund revenue impact of the rate reduction and the Iowa employment trends for the insurance industry since the rate reduction legislation was approved.

Issue review : Regents universities and the 2008 summer floods.

This issue review examines the flooding experienced by the University of Iowa and, to a much lesser degree, by Iowa State University and the University of Northern Iowa.

Issue review : Area Education Agency review update.

Information presented provides an update of the Area Education Agency issue review published in 1997, including history, organization, funding formula, revenues, expenditures, and authority.

Issue review : community empowerment.

The Community Empowerment Initiative is in the 12th year and is undergoing review for a possible redesign. This issue review provides a history of the program, a review of the current status, and some highlights from the redesign process that is underway.

Issue review : school aid funding for fiscal year 2010 and fiscal year 2011.

State school aid accounts for approximately 41.3 percent of the total general fund appropriations for fiscal year 2010. The current law estimate for fiscal year 2011 state school aid totals 2.689 billion dollars, an increase of 542.7 million dollars compared to the net fiscal year 2010 amount.This issue review provides an analysis of school aid funding for fiscal year 2010 and fiscal year 2011 and provides some alternatives that the General Assembly may wish to consider for fiscal year 2011.

Issue review : fiscal year 2011 general fund budget projection.

This issue review provides an overall summary of Iowa's general fund budget. This issue review provides projections for the 2010 fiscal year and fiscal year 2011 budgets based on the October 7, 2009 revenue estimating conference's (REC) revenue estimate. The projection also includes the impact of the Governor's 10 percent across-the-board reduction to fiscal year 2010 general fund appropriations, and the Legislative Services Agency's most recent estimates of built-in and anticipated expenditures for fiscal year 2011.