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At least 541 records · Page 30Linked to original sources
PubMed2003

Blood pressure self-surveillance for health also reflects 1.3-year Richardson solar wind variation: spin-off from chronomics.

Self-experimentation concerns not only scientists, but also each individual for the sake of his/her chronobiologic health and science literacy, eventually to be acquired in primary and secondary education. Public education ensures that everybody who knows how to read or write can dispense with the service of a costly scribe. At all ages, public education can teach equally well how to find out whether one's blood pressure (BP) and heart rate (HR) responds to an increase in sodium intake with a rise, with no change or with a decrease in BP. This task and many others could become a matter of informed self-surveillance. Whenever there are inter-individual, sometimes opposite differences in response, government-sponsored trials on groups that do not consider such differences cannot solve what only the individual can do, at first by help from schools. Eventually special institutions may be designed for chronomics, the monitoring, interpretation and archivization of chronomes (time structures; from chronos = time and nomos = rule) of biological variables, also charged with a demographic analyzing and reporting system. Each individual's properly coded record, to guard confidentiality, becomes part of a promptly accessible database for one's own needs and for society's requirements. What individuals and small groups started as chronobiology, what is immediately available on back burners, as a service by an international project on the biosphere and the cosmos (BIOCOS) (corne001@umn.edu) could become a public system of planned surveillance archivization of one's rhythms from womb to tomb. Alterations of a rhythm's amplitude or acrophase or of a deterministic or other chaotic endpoint, such as a correlation dimension and approximate entropy, or of a standard deviation, among a multitude of other endpoints, can signal (in the otherwise neglected normal range) reversible risk elevations. If these elevated risks are detected and prompt the institution of countermeasures, such prehabilitation can save the cost of rehabilitation or of long-term care after morbid events; suffering also can be prevented such as that by those who are unlucky enough to helplessly survive a massive brain, heart or societal "stroke". As an equally important dividend, science gains in basic and applied terms, as illustrated herein by the demonstration of a trans-year, an approximately 1.3 to 1.6-year, heretofore unknown component of the human BP and HR spectrum, beating with the circannual component and characterizing the same data. Chronomically interpreted self-monitoring is a civic duty for both one's health and everybody's science.

Blood Pressure Monitoring, Ambulatory↗
PubMed2005

Mathematical models for the Aedes aegypti dispersal dynamics: travelling waves by wing and wind.

Biological invasion is an important area of research in mathematical biology and more so if it concerns species which are vectors for diseases threatening the public health of large populations. That is certainly the case for Aedes aegypti and the dengue epidemics in South America. Without the prospect of an effective and cheap vaccine in the near future, any feasible public policy for controlling the dengue epidemics in tropical climates must necessarily include appropriate strategies for minimizing the mosquito population factor. The present paper discusses some mathematical models designed to describe A. aegypti's vital and dispersal dynamics, aiming to highlight practical procedures for the minimization of its impact as a dengue vector. A continuous model including diffusion and advection shows the existence of a stable travelling wave in many situations and a numerical study relates the wavefront speed to a few crucial parameters. Strategies for invasion containment and its prediction based on measurable parameters are analysed.

Aedes↗
PubMed2006

Blowing in the wind: the impact of China's Pearl River Delta on Hong Kong's air quality.

The local versus regional nature of Hong Kong's air pollution remains an unresolved issue with important policy implications. Specifically, the potential benefits of different air quality improvement efforts will vary dramatically, depending upon the nature of the pollution. This multi-disciplinary paper attempts to resolve the issue, using a time series, cross-sectional panel of pollution data from Hong Kong and southern China, along with weather variables from Hong Kong. An econometrically-based structural model of Hong Kong pollution levels is constructed, and Granger causality tests are conducted. Then, using results from the structural model, the health impacts on Hong Kong residents of reductions in mainland China's pollution are estimated and valued in economic terms. Results indicate that for the pollutants PM(10) and NO(2) causality runs in both directions, highlighting the regional nature of the air pollution problem. However, the potential health benefits resulting from reductions in southern China's pollution are relatively small. In US dollar terms, the averted mortality benefits of a large China-focused clean up are approximately $40 million, but the benefits of a more modest Hong Kong-focused effort are nearly $200 million. The resulting policy implication is that Hong Kong's primary pollution control efforts should lie at the local level.

Air↗