This research was done aimed to investigation the effective factors on production skills of tobacco growers in Mazandaran province. This is an applied study based on descriptive-correlation method. Statistical population of this research consisted of 1500 tobacco growers  of Mazandaran province, and 306 people were selected based on Morgan table. Content validity of the questionnaire was determ...

OBJECTIVES We sought to determine a generalized equation for predicting maximal heart rate (HRmax) in healthy adults. BACKGROUND The age-predicted HRmax equation (i.e., 220 - age) is commonly used as a basis for prescribing exercise programs, as a criterion for achieving maximal exertion and as a clinical guide during diagnostic exercise testing. Despite its importance and widespread use, the...

Cornell, J. A., and Berger, R. D. 1987. Factors that influence the value of the coefficient of determination in simple linear and nonlinear regression models. Phytopathology 77:63-70. In the fitting of linear regression equations, the coefficient of standard error of the observations. In nonlinear model fitting, the value of determination (R) is one of the most widely used statistics to assess ...

background when a primary radiation interacts with a medium, the secondary radiations are produced, that the contribution of these secondary radiation should considered in the calculation of dose. build-up factor is a dosimetric correction factor to assume effect of secondary radiation in calculation of dose. calculation of this factor is very difficult and time consuming. due to significance o...

BACKGROUND Previously published equations to adjust calcium for albumin concentration may vary depending on factors such as the type of reagents used. Albumin-adjusted calcium equations derived from laboratories using the bromocresol purple (BCP) albumin binding reagent have not been described. METHODS The linear regression equation for the binding of calcium and BCP-albumin was derived in a ...

Chatterjee P, Banerjee AK, Das P. A prediction equation for the estimation of vital capacity in nepalese young females. J. Hum. Sport Exerc. Vol. 6, No. 1, pp. 27-32, 2011. Till date no effort has been made to evaluate vital capacity of children and young adults in Nepal. At present it is difficult to achieve accuracy in clinical diagnosis because of the lack of a unified standard of the normal...

purpose: to investigate the factors affecting communicational skills of regimental commanders toward conscripts at an army introductory military training center in tehran. materials and methods: the participants were 82 regimental commanders of the regiments and battalions of an introductory military training center. a 21-item questionnaire was used to collect the required data. descriptive and...

Models for the prediction of conductance in nonbrine water samples through the measurement of ionic concentrations and other parameters are compared. Such predictions are often used for quality assurance purposes by comparing them with actual measurements to determine whether gross analysis errors have been made. A currently recommended method for making such predictions is a semiempirical rela...

where logP is the studied experimental response and V1 and V2 are two independent variables for which a quantitative relationship with the response has been searched for. The numbers in the equation are called regression coefficients, being the first one the intercept of the regression model. n is the number of samples used for building the regression equation, r is the multiple correlation coe...