This study employed piecewise growth curve modeling to examine how children's executive function (EF) skills relate to different components of children's physiological response trajectory - initial arousal, reactivity, and recovery. The sample included 102 ethnically diverse kindergarteners, whose EF skills were measured using standard tasks and observer ratings. Physiological response was meas...

Patients being permanently paced for symptomatic AV block were studied by overdrive suppression of the QRS-inhibited pacemaker, in order to observe the underlying heart rhythm. The chest wall stimulation method was used. In complete AV block the escape rhythm recovery time proved highly reproducible on repeated testing on the same day, and in many patients remained so over months or years. Occa...

varieties of st. john’s wort (hypericum perforatum l.) native to iran possess the largest percentage of hypercin in their leaves and flowers. isotherm curves show the relationship between the relative humidity and moisture content of the plant at a constant temperature. it is essential to understand the isotherms curves for successful storage and drying of the plant. this study used adsorption ...

A rapid, simple and reproducible HPLC method was developed and validated for the analysis of nimodipine (NM) and/or its metabolite, oxidized nimodipine (OX–NM) in rat cerebrospinal fluid (CSF) and artificial CSF. The NM and OX–NM were eluted in less than 10 min with no interferences from the endogenous CSF peaks. Analysis was carried out on a Eurospher Performance (RP-C18, 250 × 4.6 mm) column ...

        A simple, reproducible and rapid gas chromatographic method for precise determination of valproic acid (VPA) in human plasma has been developed. Total time for sample preparation and GC analysis is less than 45 min. After plasma protein precipitation, VPA was extracted into chloroform with suitable recovery. By using Stabilwax®<span styl...

Objectives: To determine the average pulse curve and analyzed the heart rate’s response during ergometrical testing in adult male soccer players. Design: Retrospective analysis of results of 708 soccer players, age span 18 – 34 years, mean age 25.34  3.73. Methods: The Bruce treadmill protocol was used. The pulse curve is formed of 12 points, starting from heart rate at rest (HRRest), average ...

OBJECTIVE Childhood deprivation is inimical to health throughout the life course. Early experiences of stress could play a role in health inequalities. An important aspect of childhood poverty that has not received much attention is cardiovascular reactivity to and recovery from acute stressors. METHODS Piecewise, multilevel growth curve regression was used to examine blood pressure reactivit...

In this article, we shall adopt the concepts of elliptic curve cryptosystems and self-certified public keys to build a novel digital signature scheme with message recovery. The public key and the identity of the user can be authenticated simultaneously in recovering the message. In addition, we shall also present three extended digital signature schemes based on the proposed scheme. The first i...

1 I n t r o d u c t i o n The problem of curve inference from a brightness image is of fundamental importance for image analysis. Computing a curve representation is generally a difficult task since brightness data provides only uncertain and ambiguous informat ion about curve location. Two sources of uncertainty are curve bifurcations (junctions) and "invisible curves" (e.g. the sides of the K...

A method is presented that fuses multiple differently exposed images of the same static real-world scene into one single high dynamic range radiance map. Firstly, the response function of the imaging device, that maps irradiating light at the imaging sensor to gray values, is recovered. The mapping is usually not linear for 8-bit images. This nonlinearity affects image processing algorithms tha...