An illustrated tutorial for logarithmic scales and decibels in acoustics.

Acoustics is generally defined as the science that deals with the production, transmission, and reception of sound and the understanding and control of its effects. In fact, the fields of acoustics cover an especially broad range of subjects and domains, and comprehensive acoustics textbooks are usually quite thick as a consequence. While they are valuable resources for researchers, these books might appear a little daunting for a young audience or for people who are new to acoustics. This paper is an example of how educational comics can be designed and used to introduce one of the most commonly discussed topics when the basics of acoustics are taught: decibel level. Seven drawn pages constitute a visual support to explain the origin and history of the decibel, together with examples from acoustics and other domains on the use of logarithmic scales and classical decibel calculations. Several comments and comprehensive bibliographical references are also provided for each drawn page to enlarge the range of subjects or exercises that can be discussed in courses and foster further readings.

Estimation of health care costs and cost recovery: the case of Rafidya Hospital in Palestine.

The purpose of this study is to develop an estimation model for health care costs and cost recovery, and evaluate service sustainability under an uncertain environment. The Palestinian National Authority's recent focus on improving financial accountability supports the need to research health care costs in the Palestinian territories. We examine data from Rafidya Hospital from 2005-2009 and use step-down allocation to distribute overhead costs. We use an ingredient approach to estimate the costs and revenues of health services, and logarithmic estimation to prospectively estimate the demand for 2011. Our results indicate that while cost recovery is generally insufficient for long-term sustainability, some services can recover their costs in the short run. Our results provide information useful for health care policy makers in setting multiple-goal policies related to health care financing in Palestine, and provide an important initiative in the estimation of health service costs.

The impact of DRG-based payment systems on quality of health care in OECD countries.

Ever since DRG-based payment systems were first introduced in the United States in 1983, the medical community has expressed concern about the potential impact of these price control systems on the quality of care. Several research studies have examined the impact of DRG-based payment systems on the quality of care within a single state in the United States, or within a specific country. We have not identified any attempts in the literature to examine the impact of DRG-based payment systems on the quality of health care across different countries. In this article we contribute to the debate by (1) providing a unique identification of DRG adoption status for each of 35 countries, (2) refining an international case mix index, and (3) applying it to examine whether DRG-based payments impact the quality of health care across national and cultural boundaries. We find some evidence for Organization for Economic Cooperation and Development countries that, compared with non-adopters, adoption of DRG-based payment systems is associated with faster hospital case mix increases and slower quality gains with respect to patient mortality from surgical and medical misadventures.