ABSTRACT
Resumen Desde su concepción, el enfoque del curso de vida se ha utilizado ampliamente en la investigación sociodemográfica y en los estudios sociológicos. El empleo de esta perspectiva se ha difundido desde hace algunos años en la investigación en salud. Sin embargo, su uso ha sido muy limitado en pediatría. Este trabajo presenta una exposición de los principales conceptos del enfoque del curso de vida y algunos principios metodológicos para el desarrollo de investigaciones desde esta perspectiva. Además, se incluyen una serie de proyectos de investigación que se han valido de este enfoque como fundamentación conceptual en su diseño e implementación y algunas fuentes de información que pueden ser utilizadas para el desarrollo de investigaciones desde esta conceptualización en México.
Abstract Since its inception, the life course approach has been widely used in the socio-demographic research and sociological studies. The use of this perspective in health research has spread for some years, although its use in pediatrics has been limited. This work presents the main concepts of the life course approach and some methodological principles for the development of research from this perspective. In addition, a series of research projects that have used this approach as a conceptual basis in their design and implementation are included, as well as some sources of information that can be used for the development of research since this conceptualization in Mexico.
Subject(s)
Humans , Pediatrics/organization & administration , Biomedical Research/organization & administration , Life Change Events , MexicoABSTRACT
Objective To analyze the optimal scales of secondary public hospitals so as to optimize the expansion of public hospitals.Methods Forty-six secondary public general hospitals in Beijing were selected as the sample,with input and output indicators pinpointed,for analysis of the status of economic return to scale of such hospitals from 1996 to 2012,and identification of inflexion points of the returns to scale.These efforts will help find an optimal scale of such hospitals.Resalts The period from 1996 to 2012 found the general effectiveness of such hospitals in a decline.In 2012,only 4 of the 46 hospitals were in DEA effectiveness status,and the other 42 hospitals were not; Forty-three inflexion points were identified.This study found that the strict control standards for secondary public general hospitals in Beijing were 298 beds and 585 staffs; the flexible control standards were 421 beds and 807 staffs.Conclclsion The optimal scales for secondary public hospitals were drown from the analysis,for references of other regions in China.The hospitals should prioritize resources efficiency instead of scale expansion.
ABSTRACT
Objective To discuss the inflexion question in the course of measuring surface tension coefficient.Methods Metal frames with different lengths,radials and metal cylinders with different inside & outside radials were used to measure the inflexion.Results The inflexion appeared in the course of measuring surface tension coefficient by using force sensor and the inflexion changed with the different radials and lengths of the metal frames.Conclusion The thickness and bending of the fluid membrane results in the change of inflexion,and the inflexion can be avoided with the length and radial chosen properly.