Home About us Contact
|
Home About us Contact | ||
|
|
||
Satisfactory Correlation (satisfactory + correlation)
Selected AbstractsCorrelation analysis of reactivity in the oxidation of anilines by nicotinium dichromate in nonaqueous mediaINTERNATIONAL JOURNAL OF CHEMICAL KINETICS, Issue 11 2006D. S. Bhuvaneshwari The kinetics of oxidation of 15 para- and meta-substituted anilines by nicotinium dichromate (NDC) in different organic solvent media in the presence of p -toluenesulfonic acid (TsOH) has been investigated. The rate of the reaction is zero order with respect to substrate, first order in NDC, and is found to increase with increase in [TsOH]. The various thermodynamic parameters for the oxidation have been reported and discussed along with the validity of the isokinetic relationship. The specific rate of oxidizing species-anilines reaction (k2) correlates with Hammett's substituent constants affording negative reaction constants. The effect of para- and meta-substituents on the oxidation rates confirms to Swain et al.'s substituent constants F and R, both with negative reaction constants. The rate data failed to correlate with macroscopic solvent parameters such as ,r and E while showing satisfactory correlation with Kamlet,Taft's solvatochromic parameters (,, ,, and ,*). © 2006 Wiley Periodicals, Inc. Int J Chem Kinet 38: 657,665, 2006 [source] Measuring the quality of clinical audit projectsJOURNAL OF EVALUATION IN CLINICAL PRACTICE, Issue 4 2000Andrew D. Millard MSc Abstract The aim of the study was to develop and pilot a scale measuring the quality of audit projects through audit project reports. Statements about clinical audit projects were selected from existing instruments assessing the quality of clinical audit projects to form a Likert scale. Audit facilitators based in Scottish health boards and trusts piloted the scale. The participants were known to have over 2 years of experience of supporting clinical audit. The response at first test was 11 of 14 and at the second test 27 of 46. Audit facilitators tested the draft scale by expressing their strength of agreement or disagreement with each statement for three reports. Validity and reliability were assessed by test , re-test, item , total, and total , global indicator correlation. Of the 20 statements, 15 had satisfactory correlation with scale totals. Scale totals had good correlation with global indicators. Test , re-test correlation was modest. The wide range of responses means further research is needed to measure the consistency of audit facilitators' interpretations, perhaps comparing a trained group with an untrained group. There may be a need for a separate scale for reaudits. Educational impact is distinct from project impact generally. It may be more meaningful to treat the selection of projects and aims, methodology and impact separately as subscales and take a project profiling approach rather than attempting to produce a global quality index. [source] Heat and mass transfer during microwave-convective dryingAICHE JOURNAL, Issue 1 2010Stefan J. Kowalski Abstract The article presents a mathematical model of drying that describes the kinetics of combined microwave-convective drying for the process as a whole. Based on this model, the drying curves and the temperature evolutions of the drying body were constructed by a number of computer-simulated drying programs, which were chosen to follow the respective experimental processes carried out on a cylindrical sample made of kaolin. The experimental data allowed both the estimate of material coefficients arising in the model and the validation of the theory. A very satisfactory correlation of the theoretical predictions with the experimental data is found. The main novelty of this article is the mathematically complete drying model that describes all periods of the microwave-convective drying process. Application of such a complete model is necessary if we want to optimize drying processes with respect to drying time and consumption of energy via computer simulations. © 2009 American Institute of Chemical Engineers AIChE J, 2009 [source] Validation of the WHOQOL-BREF among women following childbirthAUSTRALIAN AND NEW ZEALAND JOURNAL OF OBSTETRICS AND GYNAECOLOGY, Issue 2 2010Joan WEBSTER Background:, There is increasing interest in measuring quality of life (QOL) in clinical settings and in clinical trials. None of the commonly used QOL instruments has been validated for use postnatally. Aim:, To assess the psychometric properties of the 26-item WHOQOL-BREF (short version of the World Health Organization Quality of Life assessment) among women following childbirth. Methods:, Using a prospective cohort design, we recruited 320 women within the first few days of childbirth. At six weeks postpartum, participants were asked to complete the WHOQOL-BREF, the Edinburgh Postnatal Depression Index and the Australian Unity Wellbeing Index. Validation of the WHOQOL-BREF included an analysis of internal consistency, discriminate validity, convergent validity and an examination of the domain structure. Results:, In all, 221 (69.1%) women returned their six-week questionnaire. All domains of the WHOQOL-BREF met reliability standards (alpha coefficient exceeding 0.70). The questionnaire discriminated well between known groups (depressed women and non-depressed women. P , 0.000) and demonstrated satisfactory correlations with the Australian Unity Wellbeing index (r , 0.45). The domain structure of the WHOQOL-BREF was also valid in this population of new mothers, with moderate-to-high correlation between individual items and the domain structure to which the items were originally assigned. Conclusion:, The WHOQOL-BRF is a well-accepted and valid instrument in this population and may be used in postnatal clinical settings or for assessing intervention effects in research studies. [source] | |||||||||||||