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1.
Phys Rev Lett ; 85(18): 3974-7, 2000 Oct 30.
Artigo em Inglês | MEDLINE | ID: mdl-11041974

RESUMO

Many natural and technological systems have on/off switches. For instance, mitosis can be halted by biochemical switches which act through the phosphorylation state of a complex called mitosis promoting factor. If switching between the on and off states is periodic, chaos is observed over a substantial portion of the on/off time parameter plane. However, we have discovered that the chaotic state is fragile with respect to random fluctuations in the on time. In the presence of such fluctuations, two uncoupled copies of the system (e.g., two cells) controlled by the same switch rapidly synchronize.


Assuntos
Ciclo Celular , Células/citologia , Mitose , Dinâmica não Linear , Fatores de Tempo
5.
Can J Public Health ; 87(2): 86-9, 1996.
Artigo em Inglês | MEDLINE | ID: mdl-8753633

RESUMO

The 1970s and 1980s were decades of rapid growth in health care services and expenditures in Canada. Numerous government sponsored reports laid our principles for restructured health services delivery. These principles included directions such as community orientation, continuity of care and health promotion. The principles were similar, and so were the results: throughout Canada there has been limited action on these principles.


Assuntos
Financiamento Governamental/organização & administração , Reforma dos Serviços de Saúde/organização & administração , Programas Nacionais de Saúde/organização & administração , Reembolso de Incentivo/organização & administração , Capitação/organização & administração , Redução de Custos , Humanos , Medicina , Ontário , Planos de Incentivos Médicos/organização & administração , Especialização , Estados Unidos
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