In a typical peak shift experiment, control subjects are trained to respond (e.g., button-press) to a positively reinforced stimulus (Sþ, for example a line of a particular orientation or a color of a particular hue). Treatment subjects are trained in a manner identical to control subjects with respect to Sþ and also to withhold response to an unreinforced or punished stimulus (S–, a line or hu...

To date, all altered patterns of seasonal interactions observed in insects, birds, amphibians, and plants associated with global warming during the latter half of the 20th century are explicable as variable expressions of plastic phenotypes. Over the last 30 years, the genetically controlled photoperiodic response of the pitcher-plant mosquito, Wyeomyia smithii, has shifted toward shorter, more...

background: teucrium polium has been known as an important traditional medicinal plant and is used for different therapeutic purposes such as gastrointestinal disorders. therefore, the anti-spasmodic and antinociceptive activities of aqueous extract of teucrium polium w as examined. methods: anti-spasmodic effect of different concentrations (47-470 mg/l) of teucrium polium extract was assessed ...

We develop a √ n-consistent and asymptotically normal estimator of the parameters (regression coefficients and threshold points) of a semiparametric ordered response model under the assumption of independence of errors and regressors. The independence assumption implies shift restrictions allowing identification of threshold points up to location and scale. The estimator is useful in various ap...

OBJECTIVE To examine conceptual models of response shift, research design, and internal validity issues in the context of longitudinal outcome research using self-report measures such as pediatric quality of life. METHODS Growth modeling was introduced and illustrated using a previously published data set (Clay, Wood, Frank, Hagglund, & Johnson, 1995) of adjustment in children with juvenile r...

Gene expression in the stretched chicken patagialis (Pat) muscle has not been extensively examined. This study's purpose was to determine the Pat muscle's expression pattern of serum response factor (SRF), skeletal alpha-actin, and MyoD mRNAs after 3 days (onset of stretch), 6 days (end of first week of rapid growth), and 14 days (slowed rate of stretch-induced growth) of stretch. SRF mRNA demo...

abstractbackground: although electronic portal imaging devices (epids) have originally developed for positioning verification, they can also be used for dosimetric purposes. in the current work, the dose response of minimum detectable thickness of a scanning liquid filled ion chamber epid, slic-epid, and the variation of transmitted dose with the shift of inhomogeneity inside of phantom was als...

in this descriptive study, we investigated how mother and infant rooming method after delivery are implementing in academic hospitals of tehran university of medical sciences in 1993. in this research, fifteen wards include post delivery ward, surgical ward that mothers after cesarean section hospitalized in them and jointed ward that mothers who underwent cesarean section and normal vaginal de...

Background: Attention to several clinical issues simultaneously and timeliness of proper treatment is of prime importance in Emergency Medicine. Simulation Based Training is a growing trend for clinical resident training which has been proposed for enhancing of residents multi-tasking abilities. The Simulation Module for Assessment of Resident’s Targeted Event Response is a methodology which de...