McDowall, Lachlan M., and Roger A. L. Dampney. Calculation of threshold and saturation points of sigmoidal baroreflex function curves. Am J Physiol Heart Circ Physiol 291: H2003–H2007, 2006. First published May 19, 2006; doi:10.1152/ajpheart.00219.2006.— The logistic sigmoid function curve provides an accurate description of the baroreflex input-output relationship and is the most commonly used...

BACKGROUND The neutral zone (NZ) is the range over which a spinal motion segment (SMS) moves with minimal resistance. Clear as this may seem, the various methods to quantify NZ described in the literature depend on rather arbitrary criteria. Here we present a stricter, more objective definition. METHODS To mathematically represent load-deflection of a SMS, the asymmetric curve was fitted by a...

The loss of proliferative potential of a cell is often equated to cell kill, and many studies of the cellular effects of radiation (both ionising and non-ionising) utilise this definition of cell kill to define cell survival. To measure cell survival using this paradigm, a cell culture that has been exposed to a known dose of radiation is cultured and, at a predefined time post irradiation, the...

The principal focus of this study is on the measurement and analysis of labor learnings in Pakistan. The study at the aggregate economy level focus on the labor productivity movements and at large-scale manufacturing level focus on the cost structure, with isolating the contribution of the learning curve. The analysis of S-shaped curve suggests that learnings are only below one half of aggregat...

We studied the development of implicit and of verbally declared knowledge for normal human subjects who learned an unfamiliar motor task in one learning session. The exploratory nature of motor learning and a special period for optimizing skill were followed in real time. Subjects understood the goal for task success, but they had to learn a motor strategy of what pattern of serial movements to...

Ortega (1985) proposed a simple first-order differential equation to describe plant cell extension and, unlike the Lockhart equation (Lockhart, 1965), it takes into account elastic deformation of the cell wall. Cosgrove (1985) and Ortega (1985) solved the equation for the particular case of a previously growing plant cell that is deprived of its water source; thus, GR 5 0. The results (confirme...

In the field of adsorptive water remediation, Brunauer–Emmett–Teller (BET) equation is often used to describe sigmoid type II isotherm data. A standard a composite curve that comprises I and III at low high concentrations, respectively. The BET uses Langmuir-like function unique represent curve. However, ability this mathematical combination fit atypical isotherms somewhat limited. has been mod...

The monsoon rainfall has very important affect on the agricultural production, livestock as well as human ecology. In this study, try to fit Artificial Neural Network (ANN) model to predict average monsoon rainfall. For the ANN models monthly average rainfall, sea surface temperature, wind speed, monsoon rainfall, temperature is used as inputs to predict the monsoon rainfall. The feed forward n...

recurrent sigmoid volvulus is a clinical entity characterized by recurrent episodes of partial or complete sigmoid volvulus. although it is commonly seen in the elderly, it can be occasionally seen in younger patients. patients with recurrent partial sigmoid volvulus are relatively asymptomatic or present with mild abdominal pain. early diagnosis and treatment is essential to prevent conversion...