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Results for “Systems Theory”

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At least 289 records · Page 16Linked to original sources
PubMed1992

Project Alpha. A nursing elective implemented in a general systems theory curriculum.

From the perspectives of both nursing education and nursing practice, the perioperative elective was beneficial and timely. The students received knowledge and skills pertinent to their present educational endeavors and future technologic trends. In turn, the affiliating agency has a pool of potential employees who truly understand the needs of surgical patients and who may choose to become operating room nurses. Perioperative nursing does belong in the baccalaureate curriculum and is an assurance of nursing's commitment to holistic care.

Curriculum↗
PubMed2002

An open path H2O/CO2 gas analyzer for eddy correlation systems: theory and design.

A fast response, open path tunable diode laser absorption spectroscopy H2O/CO2 gas analyzer suitable for eddy correlation concentration measurements in near surface turbulent environments is presented. The turbulent temperature characteristics, analysis theory, analysis methods, design structure and specifications of this dual laser analyzer are described. A fiber connected optical head with folded optical path is used to extend the resolution to ppb levels for H2O at 1.3964 microm and CO2 at 2.014 microm. The Fourier (discrete cosine) transform absorbance ratio analysis methods are outlined along with the modifications for temperature and pressure measurements in turbulent flows. Synthesis of the reference absorbance function using measured temperature, pressure and the Hitran parameters is extended with incorporation of the Hitran parameters n, gamma temperature exponent and E'', lower state energy. Additionally, the mole fraction equation developed for this Hitran model is presented and an absolute calibration technique is outlined along with methods of calibration retention. Simulation results on mole fraction estimations and errors are presented for synthetic temperature and laser noise processes and are used to verify the specifications.

Calibration↗
PubMed2002

Interventions as tests of family systems theories: marital and family relationships in children's development and psychopathology.

This paper addresses the role of family-based studies of preventive and therapeutic interventions in our understanding of normal development and psychopathology. The emphasis is on interventions designed to improve parent-child and/or marital relationships as a way of facilitating development and reducing psychopathology in children and adolescents. Intervention designs provide the gold standard for testing causal hypotheses. We begin by discussing the complexity of validating these hypotheses and the implications of the shift from a traditional emphasis on theories of etiology to developmental psychopathology's newer paradigm describing risks --> pathways --> outcomes. We summarize correlational studies that document the fact that difficult and ineffective parent-child and marital relationships function as risk factors for children's cognitive, social, and emotional problems in childhood and adolescence. We then review prevention studies and therapy evaluation studies that establish some specific parenting and marital variables as causal risk factors with respect to these outcomes. Our discussion focuses on what intervention studies have revealed so far and suggests an agenda for further research.

Achievement↗